The Later Roman Empire
Averil Cameron
A comprehensive study - recently updated for the eBook edition - which introduces the reader to the vigour and variety of the fourth century AD.After being beset by invasion, civil war and internal difficulties for a century, the Roman Empire that Diocletian inherited in AD 284 desperately needed the organizational drive he brought to the task of putting its administration and defences on a newly secure footing. His successor, Constantine, sustained this consolidation of imperial strength by adopting a vibrant new religion, Christianity.The fourth century AD was a decisive period; its many new challenges and wide cultural diversity are reflected in the pages of its chief historian, Ammianus Marcellinus, and represented by figures as different as Julian the Apostate and St Augustine.Not only providing a vivid narrative of events, this book also draws on archaeological and artistic evidence to illuminate such central issues as economy, social structure, defence, religion and culture.‘The Later Roman Empire’ is indispensable to students, and a compelling guide for anyone interested in the cultural development of late antiquity, or in the structure, evolution and fate of empires more generally.
AVERIL CAMERON
THE LATER ROMAN EMPIRE
AD 284–430
Contents
Cover (#u8be94e47-1a67-526b-b7f7-8fab34de8c93)
Title Page (#u26915aa5-cfe7-5d6e-bd83-bab46c5637ed)
Introduction to the Fontana History of the Ancient World (#uf61e8ca7-44d5-5f9b-b0da-f9e626966a53)
Preface (#ubef86ab2-f119-5280-9e94-7d6120f32964)
Maps (#ua8b1bce7-f724-5321-b92d-69541a702c66)
I Introduction: the third-century background (#u500390dc-8cb1-585a-8653-35e8ae5fe2d9)
II The Sources (#u976cee41-a7fc-5761-8269-ace451c3f068)
III The New Empire: Diocletian (#ua2168d51-0ce4-5bcc-9236-7beddca1743e)
IV The New Empire: Constantine (#u1063bd4b-a897-5499-8c55-a01825638d2b)
V Church and State: The Legacy of Constantine (#litres_trial_promo)
VI The Reign of Julian (#litres_trial_promo)
VII The Late Roman State: Constantius to Theodosius (#litres_trial_promo)
VIII Late Roman Economy and Society (#litres_trial_promo)
IX Military Affairs, Barbarians and the Late Roman Army (#litres_trial_promo)
X Culture in the Late Fourth Century (#litres_trial_promo)
XI Constantinople and the East (#litres_trial_promo)
XII Conclusion (#litres_trial_promo)
Date Chart (#litres_trial_promo)
List of Emperors (#litres_trial_promo)
Primary Sources (#litres_trial_promo)
Further Reading (#litres_trial_promo)
Appendix (#litres_trial_promo)
Index (#litres_trial_promo)
About the Author (#litres_trial_promo)
Fontana History of the Ancient World Series (#litres_trial_promo)
Copyright (#litres_trial_promo)
About the Publisher (#litres_trial_promo)
Introduction to the Fontana History of the Ancient World (#ulink_150d3da5-657f-5393-aaeb-193ef8285842)
NO JUSTIFICATION is needed for a new history of the ancient world; modern scholarship and new discoveries have changed our picture in important ways, and it is time for the results to be made available to the general reader. But the Fontana History of the Ancient World attempts not only to present an up-to-date account. In the study of the distant past, the chief difficulties are the comparative lack of evidence and the special problems of interpreting it; this in turn makes it both possible and desirable for the more important evidence to be presented to the reader and discussed, so that he may see for himself the methods used in reconstructing the past, and judge for himself their success.
The series aims, therefore, to give an outline account of each period that it deals with and, at the same time, to present as much as possible of the evidence for that account. Selected documents with discussions of them are integrated into the narrative, and often form the basis of it; when interpretations are controversial the arguments are presented to the reader. In addition, each volume has a general survey of the types of evidence available for the period and ends with detailed suggestions for further reading. The series will, it is hoped, equip the reader to follow up his own interests and enthusiasms, having gained some understanding of the limits within which the historian must work.
OSWYN MURRAY
Fellow and Tutor in Ancient History,
Balliol College, Oxford
General Editor
Preface (#ulink_9de18b22-fada-575d-82c7-7763784f0d15)
THE MAIN IDEAS and emphases expressed in this book and its companion volume, The Mediterranean World in Late Antiquity, AD 395–600, Routledge History of Classical Civilization (London, 1993), have evolved over twenty or so years of teaching and lecturing. Although during that period the later Roman empire has become fashionable, especially in its newer guise of ‘late antiquity’, there is still, strangely, no basic textbook for students in English. I am very glad therefore to have been given this opportunity to attempt to fill that gap. My own approach owes a great deal to the influence over the years of my colleagues in ancient history, especially to those who have been associated with the London Ancient History Seminars at the Institute of Classical Studies. Not least among them is Fergus Millar, who initiated the seminars, and who both encouraged a broad and generous conception of ancient history and insisted on the great importance of lucid and helpful presentation. Most important of all, however, have been the generations of history and classics students, by no means all of them specialists, who have caused me to keep returning to the old problems, and to keep finding something new.
This book was written at speed, and with great enjoyment, partly as a relief from more difficult and recalcitrant projects. Though of course infinitely more can be said than is possible in this limited compass, I hope that it will at least provide a good starting point from which students can approach this fascinating period. It is a characteristic of this series to embody translated excerpts from contemporary sources; in the case of Ammianus Marcellinus, such translations are taken from the Penguin edition by W. Hamilton. I am grateful to the editor of the series, Oswyn Murray, for wise guidance, and to several others for various kinds of help, notably to Dominic Rathbone and Richard Williams. But they, needless to say, had no part in the book’s defects.
London, August 1992
Maps (#ulink_7fab3336-1e25-5d97-b36d-ceff8329f81b)
I Introduction THE THIRD-CENTURY BACKGROUND (#ulink_a1d3dcdd-69c4-560e-b639-d74aa04077c5)
IT IS A MARK OF the dramatic change that has taken place in our historical perceptions of the ancient world that when the new Fontana series was first launched, the later Roman Empire, or, as it is now commonly called, late antiquity, was not included in it; now, by contrast, it would seem strange to leave it out. Two books of very different character were especially influential in bringing this change about, so far as English-speaking students were concerned: first, A. H. M. Jones’s massive History of the Later Roman Empire. A Social, Economic and Administrative Survey (Oxford, 1964), and second, Peter Brown’s brief but exhilarating sketch, The World of Late Antiquity (London, 1971). Of course, the subject had never been neglected by serious scholars, or in continental scholarship; nevertheless, it is only in the generation since the publication of Jones’s work that the period has aroused such wide interest. Since then, indeed, it has become one of the major areas of growth in current teaching and research.
The timespan covered in this book runs effectively from the accession of Diocletian in AD 284 (the conventional starting date for the later Roman empire) to the end of the fourth century, when on the death of Theodosius I in AD 395 the empire was divided between his two sons, Honorius in the west and Arcadius in the east. It is not therefore so much a book about late antiquity in general, a period that can plausibly be seen as running from the fourth to the seventh century and closing with the Arab invasions, as one about the fourth century. This was the century of Constantine, the first emperor to embrace and support Christianity, and the founder of Constantinople, the city that was to become the capital of the Byzantine empire and to remain such until it was captured by the Ottoman Turks in AD 1453. Edward Gibbon’s great work, The Decline and Fall of the Roman Empire, carries the narrative to the latter date, regarding this, not AD 476, when the last Roman emperor in the west was deposed, as the real end of the Roman empire. Few would agree with Gibbon now, but historians are still quarrelling about when Rome ended and Byzantium began, and in their debate Gibbon’s highly-coloured perception of the moral decline which he thought had set in once the high point of Roman civilization under the Antonine emperors in the second century AD was passed remains highly influential. All writers on the fourth century must take a view about what are in fact highly subjective issues: was the regime of the later empire a repressive system which evolved in response to the chaos which had set in in the third century? Can we see in it the signs of a decay which led to the collapse and fragmentation of the Roman empire in the west in the fifth century? Did Constantine’s adoption of Christianity somehow assist a process of decline by finally abandoning earlier Roman values, as Gibbon thought?
All these views have been and still are widely held by historians, and permeate much of the writing on the period. It will soon be clear that this book takes a different approach. Preconceptions, and especially value judgements, cannot be avoided altogether in a history, but they certainly do not help either the historian or the student. Moreover, we are much less likely today, given the challenge to traditional values which has taken place in our own society, to hold up the Principate as the embodiment of the classical ideal, and to assume that any deviation from it must necessarily represent decline. Finally, we are perhaps more wary than earlier generations of historians of the power and the dangers of rhetoric, and less likely than they were to take the imperial rhetoric of the later Roman empire at face value. The period from Diocletian onwards is sometimes referred to as the ‘Dominate’, since the emperor was referred to as dominus (‘lord’), whereas in the early empire (the so-called ‘Principate’), he had originally been referred to very differently, simply as princeps (‘first citizen’). But the term dominus was by no means new; moreover, what the fourth-century emperors wanted, and how they wanted to appear, was one thing; what kind of society the empire was as a whole was quite another.
To gauge the difference, we must start not with Diocletian or the ‘tetrarchic’ system which he instituted in an attempt to restore political stability – according to Diocletian’s plan, two emperors (Augusti), were to share power, each with a Caesar who would in due course succeed him. We must start rather with the third century, the apparent watershed between two contrasting systems. Here, traditionally, historians have seen a time of crisis (the so-called ‘third-century crisis’), indicated by a constant and rapid turnover of emperors between AD 235 and 284, by near-continuous warfare, internal and external, combined with the total collapse of the silver currency and the state’s recourse to exactions in kind. This dire situation was brought under at least partial control by Diocletian, whose reforming measures were then continued by Constantine (AD 306–37), thus laying the foundation for the recovery of the fourth century. In such circumstances, for which it is not difficult to find contemporary witnesses, it is tempting to imagine that people turned the more readily to religion for comfort or escape, and that here lie the roots of the supposedly more spiritual world of late antiquity. But much of this too is a matter of subjective judgement, and of reading the sources too much at face value. Complaints about the tax-collector, for instance, such as we find in rabbinic sources from Palestine and in Egyptian papyri, tell us what we might have expected anyway, namely that no one likes paying taxes; they do not tell us whether the actual tax burden had increased as much as they seem at first sight to imply. While there certainly were severe problems in the third century, particularly in relation to political stability and to the working of the coinage, nearly all the individual components of the concept of ‘third-century crisis’ have been challenged in recent years. And if the crisis was less severe than has been thought, then the degree of change between the second and the fourth centuries may have been exaggerated too.
‘The third-century crisis’, ‘the age of transition’, ‘the age of the soldier-emperors’, ‘the age of anarchy’, ‘the military monarchy’ – whatever one likes to call it, historians are agreed that the critical period in the third century began with the murder of Alexander Severus in AD 235 and lasted until the accession of Diocletian in AD 284. The first and most obvious symptom to manifest itself was the rapid turnover of emperors after Severus – most lasted only a few months and met a violent end, often at the hands of their own troops or in the course of another coup. Gallienus (253–68) lasted the longest, while Aurelian (270–5) was the most successful, managing to defeat the independent regime which Queen Zenobia had set up at Palmyra in Syria after the death of her husband Odenathus. But Valerian (253–60) was captured by Shapur I, the king of the powerful dynasty of the Sasanians who had succeeded the Parthians as the rulers of Persia in AD 224, while from AD 258 to 274, Postumus and his successors ruled quasi-independently in Gaul (the so-called ‘Gallic empire’).
This turnover of emperors (the distinction between emperor and usurper became increasingly blurred) was intimately linked with the second symptom of crisis, constant warfare, which furnished an even greater role for the army, or armies, than they had already played under the Severans. The Sasanians presented a serious and unforeseen threat to the east which was to last for three hundred years, until the end of their empire after the victories of Heraclius in AD 628. Conflict with the Sasanians was to exact a heavy toll in Roman manpower and resources. Their greatest third-century king, Shapur I (AD 242–c.272), set a pattern by invading Mesopotamia, Syria and Asia Minor in AD 253 and 260, taking Antioch and deporting thousands of its inhabitants to Persia; he recorded his victories in a grandiose inscription at Naqsh-i-Rustam, with reliefs showing the humiliated Emperor Valerian. To the north and west Germanic tribes continued to exert the pressure on the borders which had caused such difficulty for Marcus Aurelius, and, before Valerian’s capture by Shapur, Decius had already been defeated by the Goths (AD 251). The underlying reasons for the continued barbarian raids and the actual aims of the invaders are still far from clear. It is a mistake to think in apocalyptic terms of waves of thousand upon thousand of barbarians descending on the empire, for the actual numbers on any one occasion were quite small. Nevertheless, there is no doubt that in these incursions the third century saw the prototype of another problem which was to assume a great magnitude in the later empire, and to which was to be accorded, by many historians, primary responsibility for the fall of the western empire. At one time or another virtually all the northern and western provinces suffered barbarian invasion, as did Cappadocia, Achaea, Egypt and Syria, and Italy itself was not exempt under Aurelian. Contemporaries could be forgiven for seeing this as the beginning of the end.
The army had already assumed far more importance than before as a result of Septimius Severus’s reforms, and the critical situation in the third century gave it a dangerous preeminence. Not surprisingly, each provincial army put forward its own candidate for emperor, and as quickly murdered him if they so chose. There was nothing to stop the process being repeated: the senate had never controlled armies directly, and even if there was an emperor in Rome he had little chance in such disturbed conditions of controlling what happened on the periphery of the empire. It was not so much that external military threats caused internal instability (though they certainly contributed), but rather that they fell on an empire which was already highly unstable, as had been vividly shown in the civil wars which broke out from the reign of Marcus Aurelius onwards. In the third century, however, further consequences soon appeared: the army necessarily increased in size, and thus in its demands on resources, and in contrast to the peaceful conditions of the early empire when soldiers were on the whole kept well away from the inner provinces, they were now to be found everywhere, in towns and in the countryside, and by no means always under control. When a more stable military system was reintroduced by Diocletian and Constantine, the situation was in part recognized as given, and the army of the later empire, instead of being largely stationed on the frontier, was dispersed in smaller units inside provinces and in towns.
Not surprisingly in such circumstances, the military pay and supply system broke down under the strain. The army had been paid mainly in silver denarii, out of the tax revenues collected in the same coin. The silver content of the denarius had already been reduced as far back as the reign of Nero, but from Marcus Aurelius on it was further and further debased, while the soldiers’ pay was increased as part of the attempt to keep the army strong and under control. The process was carried to such lengths that by the 260s the denarius had almost lost its silver content altogether, being made virtually entirely of base metal. It may seem surprising that prices had not risen sharply as soon as the debasements had begun in earnest. But the Roman empire was not like a modern state, where such changes are officially announced and immediately effected. Communication was slow, and the government, if such a term can be used, had few means open to it of controlling coins or exchange at local levels even at the best of times, and certainly not in such disturbed conditions. The successive debasements, which were to have such serious consequences, were much more the result of ad hoc measures taken to ensure continued payment of troops than of any long-term policy. But naturally prices did rise, and rapidly, causing real difficulties in exchange and circulation of goods. This is not inflation in the modern sense; rather, it was the result of very large amounts of base-metal coins being produced for their own purposes by the fast-changing third-century emperors, and of the gradual realization by the populace that current denarii were no longer worth anything like their face value. The inevitable effect of this was to push older and purer coins out of circulation, and indeed a large proportion of the Roman coins now preserved derive from hoards apparently deposited in the third century. Gold and silver disappeared from circulation at such a rate that Diocletian and Constantine had to institute special taxes payable only in gold or silver in order to recover precious metals for the treasury. Once the spiral had been set in motion, it was even harder to stop, and despite Diocletian’s efforts at controlling prices, papyrological evidence shows that they were still rising dramatically under Constantine.
This is the background to the return to exchange in kind which many historians have seen as a reversion to a primitive economy and therefore a key symptom of crisis. Not merely were the troops partly paid in goods instead of in money; taxes were collected in kind too, the main drain on tax revenue having always been the upkeep of the army. But especially in view of the experience of our own world, we should be less struck by the retreat from monetarization than by the success with which an elaborate system of local requisitions was defined and operated, and needs matched to resources. It is also relevant to note that direct exactions had always been part of Roman practice in providing for the annona militaris, the grain supply for the army, and the angareia, military transport; it was not the practice itself that was new, but the scale. But conditions were extremely unstable, especially in the middle of the century, and local populations were liable to get sudden demands without warning which caused real hardship; it was left to Diocletian to attempt to systematize the collections by regularizing them.
If the army was, if only partly, being paid in kind (money payments never ceased altogether) other consequences followed, for instance the need for supplies to be raised from areas as near as possible to the troops themselves, for obvious reasons connected with the difficulty of long-distance transport. We find the fourth-century army, therefore, divided into smaller units posted nearer to centres of distribution. Again, there were changes in command: the praetorian prefects, having started as equestrian commanders of the imperial guard, had gradually taken on more general army command functions; with these changes in the annona and requisitions generally, they effectively gained charge of the provincial administrative system, and were second in power only to the emperor. In a similar way equestrians in general acquired a much bigger role in administration, for instance in provincial governorships, traditionally held by senators. Later sources claim that Gallienus excluded senators by edict from holding such posts (Aur. Vict., Caes. 33.34), but it is clear that there was never a formal ban, and some did continue; the change is more likely to have been the natural result of decentralization and of the breakdown of the patronage connection necessary for such appointments between the emperor in Rome and the members of the senatorial class. It was more practical, and may have seemed more logical, for emperors raised in the provinces and from the army, as most were, to appoint governors from among the class they knew and had to hand.
The Senate’s undoubted eclipse in the third century is partly attributable to the fact that emperors no longer resided or were made at Rome; the close tie between emperor and Senate was therefore broken, and few third-century emperors had their accessions ratified by the Senate according to traditional practice. Meanwhile the Senate itself lost much of its political role, though membership continued to bestow prestige and valuable fiscal exemptions. Rather than owing their elevation to the Senate, therefore, emperors in this period were often raised to the purple on the field, surrounded by their troops. The legacy of this dispersal of imperial authority can still be seen under Diocletian and the tetrarchy, when instead of holding court at Rome the Augusti spent their time travelling and residing at a series of different centres such as Serdica and Nicomedia, some of which, in particular Trier and Antioch, had already acquired semi-official status in the third century. Rome was never to become a main imperial residence again. Moreover, Rome and the Senate had always gone together. But Constantine now put the senatorial order on a new footing by opening it more widely, so that membership became empire-wide rather than implying a residence and a function based on Rome itself.
In fact, the mid-third century did not see a dramatic crisis so much as a steady continuation of processes already begun, which in turn led to the measures later taken by Diocletian and Constantine that are usually identified with the establishment of the late Roman system. How therefore should the evidence of monetary collapse be assessed in this context? This is one of the most difficult questions in trying to understand what was actually happening. We need to ask how far rising prices were due to a general economic crisis and how much they were the result of a monetary collapse caused by quite specific reasons. One phenomenon often cited in support of the former argument is the virtual cessation of urban public building during this period. The local notables who had been so eager to adorn their cities with splendid buildings during the heyday of Roman prosperity in the second century no longer seemed to have the funds or the inclination to continue. The kind of civic patronage often known as ‘euergetism’ from the Greek word for ‘benefactor’, that had been so prominent a feature of the early empire, now came to a virtual halt. From the fourth century onwards the economic difficulties of the town councils become a major theme in the sources. But a drop in the fortunes of the upper classes is only one possible explanation for the cessation of building; it is clear that the upkeep of existing public buildings, which fell on the city councils, was already a problem by the late second century. Further additions to the stock might be an embarrassment rather than a cause for gratitude. By the mid-third century the uncertainty of the times in many areas also made the thought of building, as of benefactions in the old style, seem inappropriate; in cities which felt themselves vulnerable to invasion or civil war, the first interest of town councils was simply in survival or indeed repair. Some cities showed considerable resilience even after severe attack. Antioch and Athens were badly damaged by the Sasanians and the Heruli respectively, yet both were able to recover. By contrast, the cities in Gaul which suffered during the third-century invasions were more vulnerable than those in the more prosperous and densely populated east, and when rebuilding and fortification took place their urban space typically contracted, as at Amiens and Paris. While in the early empire cities had not needed strong defences, they now started to acquire city walls, and to change their appearance into the walled city typical of late antiquity. At Athens itself the area north of the Acropolis was now fortified. But in North Africa the situation was different again. There, the third century saw continued building and urban growth. Protected to some extent from the insecurity elsewhere, the North African economy profited from increased olive production, and the cities of North Africa in the fourth century were among the most secure and prosperous in the empire.
It is evident that given the rapid turnover of emperors, smooth functioning of relations between centre and periphery must have been seriously disrupted. The empire had been a balancing act from the beginning, and the equilibrium was now endangered. Formerly a balance of imperial and local interest had obtained, and had been at its steadiest during the age of the Antonines. In the third century, local cultures became much more visible. From Gaul to Syria and Egypt, local styles are more evident in visual art, and local interests had an opportunity to make themselves felt, most obviously in the so-called ‘Gallic empire’ and in Zenobia’s bid for independence at Palmyra. Another important development in the third century was the extension of Roman citizenship to all the inhabitants of the empire under the Emperor Caracalla by the so-called Constitutio Antoniana of AD 212; though Caracalla’s motives may have had more to do with getting in more taxes than with idealism or generosity, this measure extended the notion of what was considered ‘Roman’ to cover a multitude of ethnically and locally divergent cultures. Though the balance of power shifted back somewhat towards the centre under Diocletian and the tetrarchy (AD 284–305), the political and military fragmentation during the middle and later third century also had long-term implications for the cultural pattern of late antiquity. From now on, both Syriac and Coptic emerged as major literary languages used by large numbers of Christians in Syria, Mesopotamia and Egypt. The Christian church also profited: despite persecution under Decius (AD 249–51) and Diocletian (AD 303–11), it was able to develop a solid institutional structure which stood it in extremely good stead when it found favour with Constantine.
The third century was certainly a difficult period. Nor were its problems all man-made. The plague which struck the empire in the reign of Marcus Aurelius was much less serious than the attacks of bubonic plague which hit the eastern empire in the sixth century and western Europe in the fourteenth, and indeed, plague and disease were endemic in the ancient world at all periods, but it may nevertheless have been a factor, with the effects of invasion and war, conducive to a reduction in population, and with it (since land needs labour in order to produce wealth) to a diminution in the economic base. The question is highly controversial; though shortage of manpower has been adduced as a reason for the alleged decline of the empire, the case has been argued on poor grounds. Nevertheless, general considerations, together with evidence of urban contraction, especially in the western provinces, do support a cautious hypothesis of a reduction in population. But it is essential to see this over a longer period; the eastern empire at any rate was well able to recover, and there is good evidence of an actual population increase from the late fourth and certainly during the fifth century.
Modern historians, for various reasons, have been quick to emphasize the negative aspects of the period. But it is less obvious that contemporaries saw it in those terms. To our eyes, the social and legal distinctions between honestiores (‘upper class’) and humiliores (‘lower class’) are a striking feature of the later empire; yet they had been developing well before the period of the ‘third-century crisis’. Again, it is probably a modern idea to see the Gallic emperors as forming a separatist regime, for, as Tacitus had remarked, it had long been one of the ‘secrets of empire’ that legitimate emperors could be made outside Rome. Furthermore, the negative views expressed by contemporaries, on which many modern accounts rely, usually have a specific explanation. Bishops such as Cyprian of Carthage, who was himself martyred in the persecution under Valerian in AD 258, very naturally emphasized the evils of the age. On the other hand, cultural activity flourished. The philosopher Plotinus continued to lecture on Platonism in Rome and to attract fashionable crowds to hear him, besides pupils from far afield. P. Herennius Dexippus, who had led the citizens of Athens in their resistance to the Heruli, wrote a history of the Gothic and Scythian invasions, which unfortunately only survives in fragments. We tend to be misled in judging the period by the fact that no good contemporary narrative survives for the critical middle fifty years of the third century, so that we must depend on the often fanciful and trivializing Historia Augusta, which reads rather like a gossip column in a tabloid newspaper, and once read, is hard to forget.
Especially when looking back from the vantage point of modern rationalism, it is very tempting to suppose with E. R. Dodds and others that the ‘age of spirituality’ (as late antiquity has been called) grew out of the insecurity experienced in the third century, or, in other words, that people turned to religion, and perhaps especially to Christianity, in their attempts to find meaning, or to escape from their present woes. The persecuting emperors, Decius, Valerian and Diocletian, certainly believed that neglect of the gods endangered the empire’s security, and that deviant groups such as Christians must therefore be brought into line. In the same way, Constantine saw himself as specially charged by God to make sure that worship was properly conducted and properly directed. But it is one thing to suppose a general connection between religion and the desire for comfort, reassurance and explanation of suffering, and quite another to imagine that difficult times always call forth religious movements, or, to put it the other way round, that a religious development is always to be explained by reference to adverse social factors. Whether late antiquity was really more an age of spirituality than the periods that had gone before is itself now in question; it is an assumption which tends to hang together with the notion that paganism was discredited or somehow in decline, and that Christianity rose to fill the resultant gap. But this Christianizing view does not stand up to recent study of the lively and diverse religious life of the early empire, and the reasons for the growth of the Christian church and the spread of Christianity can only be located by a broad analysis, not simply by appeal to an alleged decline of paganism.
Christianization, and the profound consequences for the empire and for society of Constantine’s espousal of Christianity, form one of the strands which make late antiquity different from the early empire. But there were many others, among which we must give a special place to the series of reforms and administrative, economic and military changes which evolved during the fifty years (AD 284–337) covered by the reigns of Diocletian and Constantine. Though there were of course striking differences between them, which are vividly reflected in the surviving source material, we should also attempt to take a broad view, and to see their reigns as marking, when taken together, a fifty-year period of recovery and consolidation after the fifty-year ‘age of anarchy’, in Rostovtzeff’s phrase. Contrary to the usual emphasis, however, it was not so much Diocletian and Constantine themselves as personalities who managed to stabilize the situation, but rather a combination and convergence of factors, from which many of their ‘reforms’ in fact emerged piecemeal and ad hoc. Seen in this light, the mid-third century looks less like a time of ‘crisis’ from which the empire was dragged by the efforts of a strong and even a totalitarian emperor (Diocletian is often termed an ‘oriental despot’ because of his adoption of elaborate court ceremony in the Persian style), and more like a temporary phase in a developing and evolving imperial system.
II The Sources (#ulink_279181f7-ecdb-59a6-adf7-ae60a30edce4)
IN SHARP CONTRAST with that for the third century, the available source material for the period starting with Diocletian’s reign, and more especially for the late fourth century onwards, is extremely rich and varied. This is attributable not only to the large amount of Christian writing but also to the sheer quantity of secular writing in both Latin and Greek. The amount of Latin writing surviving from the late fourth century in particular is such as to surpass even the age of Cicero, and to make this one of the best-documented periods in Roman history. Ammianus Marcellinus, the one great Latin historian after Tacitus, completed his Res Gestae in Rome in the early 390s, while the voluminous letters of Q. Aurelius Symmachus, a latter-day Pliny, give us an idea of the priorities and the constraints on a pagan senator of wealth and position, even if not one of the superrich who are unforgettably described by Ammianus (see below). In addition, this is the age of the great Christian writers, men such as Jerome, Ambrose and, above all, Augustine, whose Greek counterparts were Basil of Caesarea, his brother Gregory of Nyssa, Gregory of Nazianzus, and John Chrysostom, the twiceexiled bishop of Constantinople. All bishops, and all highly educated in the traditional secular style, these men carried on the great tradition of classical rhetoric, which they turned to Christian purpose in speeches such as the funeral oration which Ambrose delivered in honour of the Emperor Theodosius I (AD 395). Another example, the funeral speech on Basil, bishop of Caesarea, by Gregory of Nazianzus (AD 379) has been described as probably the greatest piece of Greek rhetoric since the death of Demosthenes. The fourth and fifth centuries represent the golden age of what is termed ‘patristic’ literature, works written by the great Fathers of the Church, men who, released from persecution during the reign of Constantine, now often took on the public role of statesman as well as that of bishop.
This is just to give a preliminary idea of the richness of the available literary material. Not surprisingly, it took some time to flower, given the apparent dearth of writing in the third century and the degree of social change which took place under Diocletian and Constantine. From the middle of the fourth century, however, we begin to see an upsurge of writing of several different kinds under the stimulus of a more settled social order which offered great opportunities to those with literary talent. Ausonius, a poet and rhetor from Bordeaux, rose to the very top and became praetorian prefect and consul after gaining the post of tutor to the future Emperor Gratian, while Claudian, a Greek-speaking Alexandrian, made his fame and fortune in Rome writing Latin panegyrics, highly elaborate and rhetorical poems in praise of the Vandal general, Stilicho, and Honorius, who succeeded his father Theodosius I as emperor in the west. The fourth-century emperors tried to curb social mobility by legislation, in the interests of securing the tax revenue; but a rhetorical, that is a classical, education was a path by which one could readily climb the social ladder.
In most cases the great churchmen of the day had also had a training in classical rhetoric. Accordingly, the relation of secular to Christian culture is not easy to define (see in particular Chapter X below), and sometimes the two came very close. The pagan philosopher and rhetor Themistius, for instance, served Christian emperors apparently without difficulty, and was actually out of favour during the reign of the pagan Julian (AD 361–3). The Emperor Julian, the only pagan emperor after Constantine and an interesting writer himself, had been brought up in early youth as a Christian. He became a pagan when he was effectively exiled as a boy after his older male relatives had been murdered by their rivals, the sons of Constantine, and when he was, rather surprisingly, allowed to come under the influence of Athenian Neoplatonism. Once emperor, he produced a number of offbeat works, all in Greek, including a satire called The Caesars, partly directed at Constantine, an invective against ‘the Galilaeans’, as he called the Christians (mostly in fact concerned with Moses and the Old Testament), a hymn to the sun-god (‘King Helios’) and a lampoon called ‘The Beard-Hater’ in which he defended himself against his unpopularity with the citizens of Antioch. Earlier, he had composed a panegyric on his hated Christian patron and predecessor, Constantius II (AD 337–61) in which he still kept his paganism concealed.
We must look at certain writers in more detail before turning to the non-literary sources. For the reign of Diocletian we are badly served by contemporaries, for no connected history survives, and it is necessary to rely to a large extent on the venomous Latin pamphlet On the Deaths of the Persecutors by Lactantius, a Christian convert and formerly a rhetor at the court of Nicomedia. Writing probably about AD 314, shortly after Licinius and Constantine had declared toleration for all religions in the so-called Edict of Milan, Lactantius’s object was to make an example of the horrible deaths that had befallen the persecutors of Christians, which he does in great detail, especially in the case of Galerius. This of course makes him a highly unreliable witness to the secular aims of Diocletian, who had initiated the persecution in AD 303; unfortunately the chapter which he devotes to Diocletian’s administrative and military reforms (De mortibus persecutorum 7) is too often taken at face value. The relevant part of the Greek New History by Zosimus, the late fifth or early sixth-century pagan writer from Constantinople, is missing, but had it survived, it would of course have been equally misleading, since in direct contrast to Lactantius the pagan Zosimus praised Diocletian and blamed Constantine for every ill the empire had subsequently suffered.
For Constantine, it is a somewhat different story, for we have a number of important works by Eusebius, Bishop of Caesarea in Palestine, a great Christian writer and scholar. Eusebius established the new Christian genres of church history and chronicles, and still more important, is the major source for our understanding of Constantine. He did not suffer himself in the persecution of Christians, but knew and visited many senior clergy who did, and his later work was coloured by that experience. His Ecclesiastical or Church History, now in ten books, may have been begun before persecution broke out again in AD 303, though this is controversial; either way, it went through several rewritings as the situation literally changed all around him. The first change was when persecution was called off in AD 311, the next when Constantine defeated Maxentius in the name of Christianity at the Battle of the Milvian Bridge in AD 312; Constantine then went on to fight two further campaigns against Licinius, culminating in his victory in AD 324. The Church History received its final touches after this victory but before the Council of Nicaea which Constantine summoned in AD 325 and which Eusebius describes in his later work, the Life of Constantine (VC, Vita Constantini), completed after Constantine’s death in AD 337. Manuscript variants in the Church History make it clear that the author himself went over his earlier versions and touched them up in order to write out Licinius (previously presented in neutral or even favourable terms as Constantine’s ally) and defend and glorify Constantine as the champion of Christianity.
The Life of Constantine, in four books, is less a biography than an extended and extremely tendentious panegyric, whose exaggerations and distortions have led many scholars in the past to doubt whether it could be the work of Eusebius. Some still suspect that certain passages are later in date, but by detailed comparison with the techniques of Eusebius’s other writings on Constantine it has been convincingly demonstrated that the work as a whole is consistent with Eusebian authorship. Eusebius also composed official speeches for the dedication of Constantine’s church of the Holy Sepulchre in Jerusalem in AD 335, and a highly rhetorical panegyric of Constantine for the thirtieth anniversary of the emperor’s reign in AD 335–36, known as the Tricennalian Oration, or LC (Laus Constantini, Praise of Constantine).
There are some obvious problems about Eusebius’ reporting about Constantine. In the first place, it is extremely one-sided; he wishes to persuade us that Constantine was a model Christian emperor in everything that he did. Yet it is clear that the Life of Constantine, doubtless written with an eye to the unstable situation which followed the emperor’s death in May, AD 337, takes what Eusebius had said in his Church History much further, embellishing and adding details of a highly tendentious kind. Thus the famous story of Constantine’s vision before the Battle of the Milvian Bridge is told for the first time by Eusebius only in the Life (I.28), being entirely absent from the account in the Church History of the same battle (HE IX.9), which is clearly in general the foundation of Eusebius’s later narrative. The theme of Constantine’s youth, and his father’s alleged sympathy for Christianity, is similarly taken further than in the earlier work, the campaign against Licinius written up as though it were a holy war, and the role played in it by Constantine’s eldest son Crispus, which is recorded in the Church History, is here entirely omitted, so as cover over the awkward fact that he had been executed at his father’s orders in AD 326. All this certainly makes one suspicious of Eusebius’s honesty as a reporter. The situation is not helped by the fact that a high proportion of what we know about Constantine is dependent on Eusebius’s Life, which (like Book X of the Church History) includes a large number of imperial letters and edicts, either allegedly transcribed from official copies or translations of Latin originals, or summarized by Eusebius himself. In most cases there is no other evidence from which to check his accuracy, and it has been shown that the range of such material known to him was actually rather narrow; he met the emperor personally only at the Council of Nicaea in AD 325, and before that would have had limited access to documents and information from the western half of the empire, Constantine’s portion at the time. Eusebius’ is also the only eye-witness account of the Council of Nicaea, of which no official Acts survive, and is notoriously disingenuous, since he himself, as an Arian sympathizer recently formally condemned by another council, had much to explain away; he therefore glosses over the actual doctrinal issues so far as he can, and focuses instead on the unprecedented phenomenon of Constantine’s appearance as patron of the church:
he passed through the assembly like a heavenly angel, giving out a bright radiance as if by shafts of light, gleaming with fiery rays of purple, and adorned with the bright light of gold and precious stones. So much for his physical appearance. He could also be seen to be adorned in his character by fear of God and downcast eyes, his ruddy complexion, his gait and the other aspects of his appearance, including his height, which surpassed all those around him (II.10).
Eusebius’s deficiencies as a sober historian vividly illustrate however his ideological purpose as a Christian apologist, in which he was followed by many later Christian writers. His Church History, the first of its kind, was a pioneering work, taking the history of the church from the time of Jesus up to Eusebius’s own day. Though it is by no means devoid of stylistic pretensions, it differs from classical history in that it has a point to prove, and it includes verbatim documents in order to help its case. His Chronicle, surviving in Syriac and in the Latin version by Jerome, was essentially a chronological table beginning with Creation, and presenting the ancient kingdoms of the Old Testament as well as all Greek and Roman history as part of a linear progression which would eventually culminate with the Second Coming and the end of the world. Eusebius’s own linear thinking was further worked out in his apologetic works, the Praeparatio Evangelica and the Demonstratio Evangelica, which propounded the view that all previous history was in fact a preparation for the coming of Christ and the establishment of Christianity, and his Chronicle was to provide the basis for the later Christian world chronicle, which became a standard medieval historical form in both Greek and Latin. Unlike the Life of Constantine, which had a more obviously topical relevance, the Church History and the Chronicle immediately became standard; the former was translated into Latin and continued in the late fourth century by Rufinus and became a model for later church historians such as Socrates and Sozomen, both lawyers who wrote in Constantinople in the fifth century.
The audience for such works was no doubt largely if not entirely Christian; but there was also a need for historical works of a secular kind, and this may be the explanation for the series of short historical compendia in Latin which date from the middle of the fourth century and include Aurelius Victor’s De Caesaribus and the Breviarium of Eutropius. With the social and cultural changes of the third century, especially the decline of the Senate and shift of focus from Rome, senatorial history in the manner of Tacitus had apparently ceased to be written, while a Greek history of Constantine’s reign written by one Praxagoras, a pagan, has failed to survive intact. But from the end of the fourth century secular history in Greek underwent a considerable revival, which was to continue until the time of Theophylact Simocatta, writing in the seventh century; Zosimus’s New History falls into this category, though it is by no means one of the best examples. We ought also to include here the Latin Res Gestae of Ammianus Marcellinus, by far the most important historical work of the fourth century, deserving to rank with the classic writers of the republic and early empire, and a work with a vigour and power all its own.
As he signs off his work, Ammianus tells us that he had begun it with the year AD 96, the reign of Nerva, which is also the point at which both Tacitus and Suetonius had ended:
This is the history of events from the reign of the emperor Nerva to the death of Valens, which I, a former soldier and a Greek, have composed to the best of my ability. It claims to be the truth, which I have never ventured to pervert either by silence or a lie. The rest I leave to be written by better men whose abilities are in their prime. But if they choose to undertake the task I advise them to cast what they have to say in the grand style.
As he tells us here, he ended with the disastrous Roman defeat and death of the Emperor Valens at Adrianople in AD 378. Since the part we have, beginning at the year AD 354, late in the reign of Constantius II, comprises eighteen books in itself, and is written on a very large scale, the first part (probably up to the section on Constantine, which is unfortunately lost) must have been considerably abbreviated by comparison; some scholars have believed that he wrote two separate works, but this is unlikely. In any case, Ammianus’s focus of interest changed in the last six books, which deal in famous detail with Rome and the vices of its late fourth-century senatorial class; though he was a pagan himself, the scathing vehemence with which he condemns the love of luxury among these Roman grandees makes it unlikely that he was the recipient of their patronage, or a spokesman for a supposed senatorial ‘pagan reaction’ (see Chapter X); book 28 includes a lengthy excursus on the vices of the nobility (28.4; cf. also 14.6), in the course of which Ammianus remarks that ‘some of them hate learning like poison but read Juvenal and Marius Maximus with avidity. These are the only volumes that they turn over in their idle moments.’ There seems to be a personal note here, but his actual milieu while in Rome remains a mystery, as does the identity of his patrons, if any; there are many other details about him which remain equally obscure, for instance his exact relation to contemporary Latin writers, including the author of the mysterious Historia Augusta (see below). Nor is it clear when he began writing, or how far his conception of the work changed during a long period of travel, which lasted from the death of the Emperor Julian (AD 363) until his arrival in Rome some time before AD 384. Completion of the work came in the early 390s.
Ammianus describes himself as ‘a Greek’, and it is generally believed, though not on conclusive evidence, that he came from Antioch, a major seat of imperial administration in the east, where Latin would have been used in official and military circles. His inspiration was certainly the Emperor Julian, on whose ill-fated Persian expedition he served himself as an officer, and his books about Julian (20–25) are masterpieces of writing. Julian’s death during this campaign from an unexplained arrow shot (25.3; cf. Ammianus’ obituary of Julian, 25.4) must have been a severe blow to Ammianus himself; somehow, however, the material he had evidently collected while serving on this campaign became the basis of a grand imperial history, stretching backwards in time to AD 96 and forwards to AD 378.
Ammianus is an original. A staunch conservative in his views, he admired Julian not only for his personal qualities as a leader, but also for his attempt to revive the independence of cities. Like Julian, Ammianus disliked the centralist policies of Constantine, and his account of Constantine, which would have been a major counterpart to that of Eusebius, is a great loss. As a pagan, Ammianus was no great lover of the Christian church, and his Roman books emphasize the unseemly conduct of ecclesiastical parties in Rome in the 370s and 380s, but his judgement remained independent, and Julian’s idea of preventing Christians from teaching as a means of reducing their influence earned his criticism:
the laws which he enacted were not oppressive, and what they enjoined or prohibited was precisely stated, but there were a few exceptions, among them the harsh decree forbidding Christians to teach rhetoric or grammar unless they went over to the pagan gods. (25.4)
In general, though, even a hasty look at his choice of vocabulary and his frequently expressed personal opinions shows that he had strong prejudices; while professing to abhor any form of excess and to commend moderation in all things, he himself saw the world, and especially human beings, in lurid terms, as is shown in his famous judgement on the Emperor Valentinian (29.3), where he remarks that he had ‘two savage man-eating she-bears, called Golddust and Innocence, to which he was so devoted that he had their cages placed near his bedroom’.
Ammianus has often been criticized for his supposedly uncouth Latin, which many scholars have attributed to his having been brought up as a Greek-speaker, but though often clumsy, his Latin is vivid, even melodramatic, and his highly-coloured vocabulary, which shows through even in translation, gives it a unique flavour. Comparison with contemporary writers shows that what has often been attributed to Ammianus’s poor Latin is in fact standard late Latin usage. Because of the vividness of Ammianus’s own writing, and his sharp eye for the bizarre, he has been seen as an essentially unclassical writer. However, this view is actually a disguised value judgement, which goes together with the notion of a qualitative ‘decline’ from the classical to the medieval. With the revaluation of late antiquity we can at last take Ammianus on his own terms (as Edward Gibbon did) and recognize in him one of the great writers of antiquity.
This is hardly the case with the author of the Historia Augusta, who seems to have composed his strange work in Rome very close in date to the completion of Ammianus’s Res Gestae. Purporting to be the work of six authors writing under Constantine, this is a collection of imperial biographies beginning with Hadrian in the early second century, which become progressively more fanciful and scandalous and less historical as they reach the middle and later third-century emperors. Its purpose hardly seems to have been that of serious history, and indeed, as we have seen, Ammianus writes scathingly about the contemporary taste for such biographies, so different from the serious purpose of his own work (see above on his reference to Marius Maximus, 28.4). Though some scholars have seen the Historia Augusta as a document of anti-Christian propaganda, it is hard to regard it as anything but light reading. As regards the Constantinian date, there are in fact many apparent anachronisms, of which enough are convincing to make it almost certain that this is a late fourth-century work; moreover, stylistic analysis aided by computer techniques suggests that it is the work of a single author (‘the joker’, as Syme calls him). It is our own misfortune that we have to rely so heavily for third-century history on what was no more than a bow to prevailing popular taste.
A final Latin work of the late fourth century must be mentioned in connection with the so-called pagan revival. This is the lost Annales by Nicomachus Flavianus, the pagan senator who committed suicide after the defeat of the usurper Eugenius by Theodosius I at the River Frigidus in September, AD 394. Like the Historia Augusta, this work, known from contemporary inscriptions, has been made into a cornerstone of the theory of a heavily ideological pagan revival among the senatorial class of the period, which it is assumed would have extended to its view of the Roman past. But while Nicomachus Flavianus himself evidently saw the battle at the River Frigidus as representing the confrontation of Christianity and paganism, and indeed is said by Christian authors to have cited oracles promising a pagan victory and the suppression of Christianity, we know hardly anything about the nature of the work itself. Nicomachus himself did however translate from Greek into Latin the tendentious Life of the pagan holy man Apollonius of Tyana by the second-century writer Philostratus. It would have been strange indeed if the literary productions by pagans written in so tense a period as the 390s, when Theodosius I’s anti-pagan legislation had stirred up violence in a number of cities, did not somehow reflect their ideological stance; after all, as we have seen, Christian writers constantly interpreted historical events in such a way as to demonstrate the triumph of Christianity or to explain away its setbacks. The greatest work of this kind was Augustine’s City of God (De Civitate Dei), a work of twenty-two books written in part at least to explain why God had allowed the sack of Rome by Alaric the Visigoth in AD 410. There is no likelihood however that Nicomachus’s Annales was a similarly philosophical or meditative work. Indeed, a number of fundamental problems have been exposed in the general theory of pagan revival insofar as it has been based on specific literary sources; these will be discussed further in Chapter X.
The genre of biography, the Life, plays an important role in the literary sources of this period. The encomium, or panegyric, had always had elements of biography in it, and Eusebius’s Life of Constantine combined both these forms, while also owing something to the existing tradition of lives of philosophers and holy men. Later in the fourth century both Christians and pagans developed such writing further. The classic work on the Christian side was the Life of Antony, the Egyptian hermit (d. AD 356), often held to be the first example of Christian hagiography (saints’ lives) and attributed to Athanasius, bishop of Alexandria since AD 328 and a central figure in the religious controversies of the fourth century. The work exists in Syriac as well as Greek, and some uncertainty surrounds its origins. The Greek text which survives presents Antony as being above such worldly concerns as rhetorical education; this was also a stance adopted by Athanasius himself, but rejection of culture was a matter of degree – the Life does not hesitate to have Antony delivering elaborate speeches or receiving imperial letters from Constantine. Whether or not by Athanasius, the Life was quickly translated into Latin and transmitted to Christian circles in Rome by Jerome, where it became the key text in the promulgation of the ascetic lifestyle. Augustine writes in the Confessions of its role in the process of his own spiritual development (see below). The Life of Antony set a moral and literary pattern: it emphasizes ascetic renunciation (symbolized by the desert) at the expense of worldly knowledge, and presents the life of the Christian holy man in terms of the progress of the soul towards God. The saint is marked out by his holiness, and indicated to others by the miracles he can perform (in Antony’s case, taming wild animals). This literary pattern, often influenced by the secular rhetorical encomium, was followed in countless later works from the fourth century into the Middle Ages. Hagiography can and does vary greatly in the extent of its historical content, from the virtually non-existent to the heavily circumstantial; each work has to be taken on its own merits, but it was certainly the Life of Antony which provided the classic model, and it would be hard to overestimate its importance. Jerome, characteristically, tried to go one better, himself composing Latin lives of rival hermits, Hilarion and Paul, as well as the Life of Malchus, all three of them essentially literary imitations of the Life of Antony.
Two other interesting Lives may be cited, both of women. First, the Greek Life of Macrina written by her brother Gregory of Nyssa. This is also a highly literary and indeed philosophical work, drawing on Plato’s Phaedrus for its presentation of the immortality of the soul. Macrina and Gregory came from a large landowning family which also included the great figure of Basil of Caesarea. As we learn from the Life, as a woman Macrina had not received the secular education given to her brothers, but had stayed at home with her mother in Pontos, where she later established a kind of religious community at the family home. She, according to Gregory, had the true philosophy, not Basil, despite all the glittering prizes he had won at Athens. The other, very different, Life of a woman is that written about Melania the Younger (d. AD 439), who at the age of twenty persuaded her husband Pinianus, whom she had married at thirteen, to renounce their vast inherited properties in order to lead a life of asceticism and religion. The Life of Melania the Younger survives in both Latin and Greek versions, which are similar but not identical; the original may have been written in Greek c. AD 452 by Gerontius, a deacon at Melania’s monastery on the Mount of Olives in Jerusalem. As we have seen, Christian works were often immediately translated, and indeed Melania herself was fluent in both languages. The evidence of the Life is of great importance, not simply for Melania herself and her family connections with the Roman senatorial aristocracy but also as a primary document for economic history, since it provides detailed information about Melania’s estates and the sources of senatorial wealth. This is a good example of a hagiographical text which combines the ascetic theme (‘the angelic life’) with a large amount of hard historical material. Finally, both the Life of Macrina and the Life of Melania the Younger are witnesses to a feature of Christian writing which is hard to parallel in classical sources in their choice of a woman as the main subject. There was much in late antique Christianity that was deeply inimical to women, yet the fact that Christian women of good family like Macrina and Melania (and many others are known in the late fourth and early fifth centuries) became the subjects of works by male authors is something remarkable in itself.
One of the most famous literary productions of this period is Augustine’s Confessions, often regarded as the first ancient autobiography. That judgement however fails to do justice to the philosophical complexities of the work, whose thirteen books discuss such topics as memory and the nature of time; it does however contain detailed accounts of Augustine’s own life, background and intellectual development, which are of great importance for cultural history, as well as the unforgettable account of his own conversion experience in a garden at Milan (VIII.14–30). Feeling the call of God, Augustine resisted – ‘just a little longer, please’ (Conf. VIII. 12) – until a certain Ponticianus, a baptized Christian, came to visit and told Augustine and his friend Alypius about Antony, of whom they had never then heard, and of how one of his own friends had been converted through reading the Life of Antony. After hearing this story Augustine went out into the garden and struggled with his conflicting feelings, especially his reluctance to renounce his sexuality and commit himself henceforth to a life of Christian chastity. Following a mysterious impulse, which he describes as hearing a child’s voice, he opened his text of St Paul at Rom. 13.13–14 ‘put on the Lord Jesus Christ and make no provision for the flesh in its lusts’, and at once feeling at peace in himself, he went inside and joyfully told his mother Monica what had happened. The most striking feature of the Confessions is the honesty and power of Augustine’s psychological observation of himself and of human nature in general. Augustine’s understanding of human feelings, human emotions and human sexuality pervades the Confessions, and is constantly to be found even in his most intellectual theological works. Augustine is a towering and exceptional figure; but this focus on the individual can also been seen elsewhere in the Christian literature that was now developing, and is reflected for instance in the important sets of letters written by Augustine and his contemporaries, such as Ambrose, Jerome and John Chrysostom. As for the Confessions, it is one of the great works of world literature, and one that is hard to imagine coming from the classical world.
Two Latin texts from the fourth and early fifth centuries are particularly important for the late Roman army. These are the anonymous treatise dating from the late 360s, known as the De Rebus Bellicis, and the official document setting out the military establishment of which we have an early fifth-century copy, the Notitia Dignitatum (‘List of Offices’). The first is the work of a rather original, but unknown, author, who addressed to the reigning emperors Valentinian and Valens a memorandum outlining a series of ingenious inventions by which military performance could be improved. He was clearly a pagan, and blames Constantine for extravagant public spending; he complains both that the defence of the empire is too weak and that too much money is spent on the army. The understanding of the anonymous author leaves something to be desired, both as an economic analyst and as a military commentator, but his little work comes as a breath of fresh air, and it seems a pity that we do not know whether it was even read, let alone whether it had any effect. As for the Notitia, what we have is a copy of a document, illuminated, incidentally, with interesting depictions of military insignia, that purports to set out full details of the military and civil provincial establishments. It is therefore prima facie an extremely important source. However, it must be used with great caution, for several reasons. First, the surviving text postdates the division of the empire in AD 395, and is a western document; the eastern parts seem to relate to an earlier phase than the western, so that the document as a whole contains anomalies and discrepancies. Second, and fundamentally, the Notitia sets out the situation as it was supposed to be, which is not necessarily how it actually was at any given time. Like the lawcodes, it is prescriptive, not descriptive; this makes it dangerous to take its figures on trust unless they can be corroborated by other means.
Similar caveats apply to one of the most important sources of all – the Codex Theodosianus, a collection of imperial legislation from Constantine onwards, put together in Constantinople by a group of legal commissioners over the years AD 429 to 438 as part of a wider legislative project ordered by the Emperor Theodosius II, and a vital source for the history of the period. The constitutions are arranged thematically, according to subject, and in chronological order within the subject headings, and there are over two thousand five hundred in all. They begin in AD 311, and build on two earlier collections made under Diocletian, the Codex Gregorianus and the Codex Hermogenianus. Historians have to be very cautious when using the evidence of the Code. In the first place, it is not complete: the laws were dispersed and the commissioners had a difficult task in collecting them. Justinian’s later collection includes many constitutions not in the Theodosian Code. Further, though care was taken to preserve the original wording, many constitutions were shortened, and the commissioners were at the mercy both of their sources (not always good) and their own judgement.
More generally, many constitutions were simply repeated with variants by one emperor after another, so that it can be difficult to know how far they represent a response to a real situation and how much is simply taken over from previous precedent. The constant repetition of certain laws, especially those limiting freedom of movement for decurions (members of town councils) and coloni (agricultural tenants), did much to encourage the view of the fourth century as a repressive, or even a totalitarian regime, until it was pointed out that constant repetition usually indicates that the laws in question were in fact ineffective.
It is essential to realize that the Code consists of a set of prescriptions; it does not tell us what actually happened. Furthermore, other sources suggest that the process of legislation itself was far less straightforward than we might imagine. Constitutions passed in the name of a certain emperor are not necessarily to be associated with him personally; drafting responsibility lay with the quaestor sacri palatii, a post established under Constantine, whose job it was to deploy the elaborately rhetorical style which makes the Code such tortuous reading. Getting laws to the public was also a hit-or-miss affair. Though provincial governors had the task of making them public, ignorance of the law was common, as the constitutions themselves often reveal.
The administration and the bureaucracy in the later empire were highly complicated even in theory; in practice the system was full of loopholes and the rules, such as they were, were continually evaded, at times even with the open connivance of the authorities who should have been enforcing them. The mass of legislative material in the Code reveals both the ideal and the constant departures from it.
To this ample and often contradictory evidence can be added what we can glean from other non-literary sources, including the many surviving inscriptions, papyri and coins. Among the most important inscriptions are Diocletian’s Edict on Maximum Prices (AD 301), of which several versions are known, and his so-called Revaluation Edict. Like the laws in the Code, of which type this is an inscribed example, the Price Edict adopts a heightened moral tone, laying down terrible penalties for anyone who dared to put up prices beyond what was prescribed for each item:
Who is so insensitive and devoid of human feeling that he is unaware or has not perceived that immoderate prices are widespread in the commerce of the markets and the daily life of cities, and that uncontrolled lust for gain is not lessened by abundant supplies or fruitful years? … Since it is agreed that in the time of our ancestors, it was customary in passing laws to prescribe a penalty, since a situation beneficial to humanity is rarely accepted spontaneously, and since experience teaches that fear is the most effective guide and regulator for the performance of duty – it is our pleasure that anyone who violates the measures of this statute shall, for his daring, be subject to capital punishment.
Despite such rhetoric, and despite the many inscriptions and papyri which made the edict public, we know in this case that it was a dead letter within a very short time; the government simply lacked the necessary apparatus to put it into force. Many other inscriptions of the period are less dramatic – for instance the career inscriptions of the senatorial class, which increase in number with its re-establishment by Constantine, or the many inscriptions from cities of the Greek east, which now begin to use classicizing verse even for recording the careers of city officials. To these are added a new class: church dedications and Christian funerary inscriptions. As for coins, they are an important source for imperial titulature and imperial movements, especially during the tetrarchy and under Constantine. Many aspects of the late Roman bronze coinage remain obscure, but the gold solidus, introduced by Constantine, remained undebased and in use for many centuries.
No attempt is made at this point to describe or evaluate the archaeological and visual evidence for the period. This is partly because the range is so wide in each case that it would be impossible to summarize. But the other reason is that it is simply impossible now to write a history of this period without constantly referring to archaeological and visual evidence. Whereas Jones could base himself on an exhaustive knowledge of the literary and documentary sources, the subject has moved on dramatically in the last twenty-five years. Archaeologists have turned increasingly to this period, especially once a system had been evolved for dating late Roman pottery; general interest in urban history of all periods has focused attention on the wealth of material available from late Roman cities; and finally, as political and narrative history have lost their appeal, most historians have become much more conscious of the need to use material as well as literary evidence. As for visual art, two factors have brought about closer integration of this with the literary and documentary record; first, a growing willingness to take in Christian evidence, including Christian art, and second, the effects of a tendency in other periods of ancient history, perhaps deriving from modern comparisons, to place emphasis on the visual environment and the power of images as a means of communication. To sum up, the main writers are of course still the same, though they are in many cases viewed differently; by contrast, the scope of study has broadened out of all recognition.
III The New Empire: Diocletian (#ulink_91f6dde7-61b1-55ca-abf1-77854ef2a3f4)
BETWEEN THE accession of Diocletian in AD 284 and the death of Constantine in AD 337, the disturbed situation which held in the mid-third century came under control and the empire passed through a phase of recovery, consolidation and major social and administrative change. In effect, the system of government which was to prevail in the east until the early seventh century, and in the west, though with less success, until the fall of the western empire in AD 476, was put into place. It is natural to attribute the achievement mainly to the two strong emperors who ruled during the fifty-three-year period, especially since this is also the tendency of the ancient sources; but it is necessary to remember that the actual process certainly involved less forward planning and more piecemeal development than hindsight would suggest. Caution is particularly necessary in view of the tendency of the sources to draw an over-sharp distinction between Diocletian and Constantine because of their religious differences, and to let that distinction carry over into the interpretation of their secular policies.
Diocletian came to the throne in AD 284, having risen from a lowly background in Dalmatia to command the domestici, the imperial guard. He was thus one of the several Illyrian soldier-emperors who reached imperial power after the death of Gallienus in AD 268. The Emperor Aurelian (AD 270–5) had been able to repel an invasion of Italy by the Alamanni, defeat Zenobia at Palmyra and put an end to the ‘Gallic empire’ under Tetricus. Like Gallienus and so many others, Aurelian was murdered, but this time the assassins were punished, and Probus (AD 276–82) not only drove back the Germanic invaders from the Rhine, which they had crossed in force, but concluded a treaty establishing a Roman military presence beyond the Rhine and taking large numbers of hostages and recruits for the Roman army. When Probus too was murdered by his own troops, Carus (AD 282–3) embarked on a major and successful Persian expedition, only to die suddenly with the army on the Euphrates. His son Numerian led a Roman retreat, but when he too died under suspicious circumstances while on the road, Diocles was elevated at Nicomedia in November, AD 284, allegedly accusing his rival, the praetorian prefect Aper, of having murdered Numerian and stabbing him to death on the spot in full view of the troops, quoting from Virgil as he did so (SHA Vita Cari 13); he then took the name Diocletian. In the following year Diocletian defeated Carus’s other son Carinus in a major battle in the former Yugoslavia and found himself in total control.
Even more pressing than the question of military security was that of how to put an end to the rapid turnover of emperors. Diocletian’s answer lay in the establishment in AD 293 of a system of power-sharing known as the tetrarchy (rule of four), by which there would be two Augusti and two Caesars, the latter destined in due course to succeed. Once established, the tetrarchic system lasted until it was destroyed by the ambition of Constantine, who had been raised himself on the death in AD 306 of his father, Constantius, who had first been made Caesar and then Augustus during the reign of Diocletian. Diocletian’s scheme did not come into being immediately on his accession. His first step was to raise another Illyrian soldier, Maximian, to the post of Caesar, at the same time adopting him as his son, though he was only a few years younger than himself (AD 285). An ad hoc division of responsibility gave Maximian the west while Diocletian was in the east; the fact that a certain Carausius had been declared Augustus in Britain no doubt influenced Diocletian to make Maximian Augustus in AD 286. Even then, the further step of appointing two Caesars was not taken until March, AD 293. Constantius and Galerius now became Caesars to Maximian and Diocletian respectively; the arrangements were sealed by dynastic marriages and the adoption of Diocletian’s family name Valerius, and advertised on coins and in official panegyric. Diocletian and Maximian, meeting formally at Milan in the winter of AD 290–1, had already affiliated themselves to the gods Jupiter and Hercules by taking the divine titles Jovius and Herculius, and their Caesars shared the same titulature and the same religious associations. As heir to his father Constantius, Constantine too is attested as Herculius in AD 307.
A porphyry statue group now to be seen as part of San Marco, Venice, shows the tetrarchs as squat figures in military dress, embracing each other. The surviving Latin panegyrics, like the Historia Augusta, emphasize unity and concord:
Four rulers of the world they were indeed, brave, wise, kind, generous, respectful to the senate, friends of the people, moderate, revered, devoted, pious. (SHA Vita Cari 18)
Such heavy-handed propaganda betrays the fragility of the new arrangement: it rested on nothing more solid than consent. Carausius, who had seized power in Britain, was murdered and replaced by his rival Allectus in AD 293; Allectus was defeated in turn by Constantius in AD 296, who then entered London as a liberator (Pan.Lat. 8(5)). Not that the defeat rewarded legality at the expense of usurpation, as the victors naturally claimed, for Carausius had been recognized as Augustus in Britain and north-west Gaul, and had issued coins in that capacity.
The propaganda, and the religious aura claimed for the tetrarchy, no doubt helped to impress their subjects, and to reassure Diocletian and his colleagues themselves, but it was in fact military, and by extension political, success which conferred legitimacy. Diocletian’s system remained in place only until it was challenged from within, after Diocletian himself retired in AD 305. Luckily for the empire, however, even though the tetrarchy was threatened in its early years by the regime of Carausius, it did ultimately succeed in providing a period of stability lasting nearly twenty years – long enough for some far-reaching changes to be introduced.
Any assessment of the nature of Diocletian’s reforms is rendered difficult by two factors: the unsatisfactory nature of the surviving literary evidence for his reign, and the fact that many individual changes either came in at a later stage, or are only attested later. Another problem is caused by the exaggerated contrast between Diocletian and Constantine which prevails in the sources; rather, Constantine’s secular policies, and even some aspects of his religious ones, should be seen as continuing the general line established by Diocletian.
One of Diocletian’s first priorities was military: not only had the army to be brought under central control and made into a force capable of defending the security of the empire, but it also had to be reliably supplied. The literary sources attribute to Diocletian the most fundamental changes that the Roman military system had experienced since the days of Augustus, and they have been followed by most modern scholars; however, it may be doubted whether the break with what had gone before was quite as sharp as this suggests. The way had already been prepared by earlier emperors, including Marcus Aurelius, Septimius Severus (AD 193–211) and Caracalla (AD 211–17). During their reigns army pay was doubled, donatives to the soldiers institutionalised, the army itself enlarged and openings for military men in the administration greatly increased. More units had certainly also been raised in the course of the third century. The hostile Lactantius associates the reforms of Diocletian with his establishment of the tetrarchy:
he appointed three men to share his rule, dividing the world into four parts and multiplying the armies, as each of the four strove to have a far larger number of troops than any previous emperors had had when they were governing the state alone. (DMP 7.2)
But Lactantius can hardly be taken to mean that the army had quadrupled, especially as it is likely that it had already risen during the third century to something over 350,000. More probably this, like other remarks in the same chapter, is a hostile exaggeration, more a jibe than a sober estimate. Diocletian did perhaps increase numbers (new units were certainly created), but may not have done very much more in general than recognize and regularize the status quo. The backbone of the army had traditionally been the legions, well-armed and well-drilled units of about five thousand infantry. Reading back from the evidence of the Notitia Dignitatum (see above, Chapter II), Diocletian created new legions on a considerable scale, giving them names such as Iovia, Herculia, Diocletiana and Maximiana, while others had already come into being during the third century. But a large increase in the number of legions does not necessarily imply a doubling of the actual numbers of troops. Archaeological evidence drawn from the size of legionary fortresses and literary evidence both show that legions in the later Roman empire were much smaller than their predecessors, typically comprising only a thousand or so men, while special detachments (vexillationes) often stood at only five hundred or less; this implies that the calculations of total size based on earlier norms will be very misleading, and suggests that the actual total was considerably less than is often supposed.
Calculating the size of the late Roman army is very difficult. We have few actual figures for its total. At least one of them (six hundred and forty-five thousand, according to the historian Agathias, writing in Constantinople in the later sixth century) is impossibly high, although it might reflect a paper figure never realized in practice. Calculations based on the figures in the Notitia are likely to suffer from similar limitations. It ought to be possible in theory to base overall calculations on papyrus evidence surviving from AD 299–300, which gives the levels of pay for certain regiments, but here too there are many imponderables as to the actual size of the units. Yet the total size of Diocletian’s army is extremely important in assessing the economic problems which may have led to later decline, for if it really did double in size, the extra burden on the state revenues would indeed have been colossal. Current research seems however to point to an army size of not much more than four hundred thousand; even so, the implications for supply, pay and recruitment were extremely serious (for further discussion, see Chapter IX below).
Like Lactantius, the pagan historian Zosimus draws an exaggerated distinction between Diocletian and Constantine when he accuses Constantine of having damaged Roman frontier defences by removing ‘most’ of the troops from the frontiers, where they had been placed by Diocletian, in order to create a new field army (New History II.34). He adds that these soldiers thus became accustomed to the luxury of life in cities, and grew enervated as a result. But this is all part of his tirade against Constantine; we know from epigraphic evidence that the field army (comitatus) certainly already existed under Diocletian and indeed earlier (Constantine may simply have enlarged it), while the stationing of soldiers in or near cities was a direct function of the problems of army supply and requisitions. All agree that Diocletian strengthened the frontiers, building forts, strengthening natural barriers and establishing military roads from Britain in the west to the so-called Strata Diocletiana in the east, a road running from the Red Sea to Dura on the Euphrates. But it is unlikely that these borders were yet manned by limitanei, farmer-soldiers living on the frontiers, who emerge only later. Moreover, the policy of ‘defence-in-depth’ attributed to Diocletian and popularized in a book by the modern strategist Edward Luttwak and others, whereby the border troops were designed to hold up invaders until crack troops moved up from defensive positions further inside the empire, has been deservedly criticized by archaeologists and others who have studied the material remains in detail (see Chapter IX). The Roman army in the late empire was different from that of Augustus, and used in different ways. Ammianus gives a vivid picture of the varied and sometimes outlandish insignia in use in the second half of the fourth century. In the same period recruitment in some areas became difficult and unpopular; the place of volunteers was therefore taken more and more by conscripts and by barbarians, both as regular troops and as federate mercenaries. But like much else this took time to work through, and we should not attribute more to Diocletian than he actually did.
One of the most severe problems associated with the army was that of pay and supply. With the collapse of the silver coinage, used for the payment of taxes and the soldiers’ wages, the army had to be paid and supplied partly in requisitions in kind through the annona militaris and the capitus (a fodder ration). If such a system worked at all, it was bound to be unreliable, clumsy and extremely burdensome on local populations, who never knew what was going to be demanded from them or when. Since perishable goods could not be carried far because of the extreme slowness of land transport, there were also formidable problems of supply. It is a miracle that some level of central organization was nevertheless maintained in such conditions; however, some improvement had to be sought. Diocletian effectively recognized the status quo and introduced an elaborate new tax system in kind, based both on capita (‘heads’, i.e. poll tax, capitatio) and land (iugatio). All agricultural land was divided into notional units known as iuga, varying in size according to the assessment of their productivity. Iuga, tax units, are not to be confused with iugera, units of area; thus in Syria, five iugera of vineyard made one iugum, which might however comprise as much as forty iugera if the land were of poor quality. Mountain territory was specially assessed on a local scale of productivity; a later legal textbook describes the process:
at the time of the assessment there were certain men who were given the authority by the government; they summoned the other mountain dwellers from other regions and bade them assess how much land, by their estimate, produces a modius of wheat or barley in the mountains. In this way they also assessed unsown land, the pasture land for cattle, as to how much tax it should yield to the fisc. (Syro-Roman Law Book, cxxi, FIRA II.796 = Lewis and Reinhold, II. 128)
Not only that: what was actually to be paid also ideally had to be linked to what was produced locally. The whole was to be assessed by a regular census, organized by five-year periods, known as indictions, from AD 287 onwards.
By these means, Diocletian sought to establish for the empire something like a regular budget, and some check was placed on the ad hoc requisitions which had become such a burden during the third century. The system aimed at providing what the troops needed on a regular and reliable basis. A. H. M. Jones comments that its great virtue lay in its simplicity (LRE, I, 65). This however is a modern view; in the conditions of the late third century, the amount of work and organization needed to put it into practice was beyond all proportion to what had gone before, and the mechanisms of economic control were both crude and poorly understood. In practice there was considerable variety from province to province, and while a large amount of evidence survives to show how the reforms were carried out, it is very unevenly distributed. Thus we know something of what happened in some areas – Syria and Egypt, for example – but nothing at all about others, such as Spain or Britain. It is therefore impossible to judge how effective the system was in any detailed way, though we can assume that Diocletian’s arrangements remained in force. But cash payments also remained in force for the army, as can be seen from the ample evidence of minting of coin, and the annona itself often took the form of compulsory purchase of goods by the state rather than transactions wholly in kind.
These were reforms of practice, not of principle: the major tax burden continued to fall on those least able to bear it, the main tax still fell on the land, and the notion that high status should carry with it exemption from certain taxes was an idea which permeated Roman attitudes to taxation at all periods, even when the empire could least afford it. Diocletian did not attempt to introduce taxation of senators or merchants, and when Constantine did so the initiative was highly unpopular. Whether the overall rate of taxation was itself actually substantially increased, as has been argued in the past, is doubtful; indeed, papyrological evidence suggests that it remained surprisingly stable over many centuries, from the early empire to the beginning of the Byzantine period in Egypt. This means that the net effect of Diocletian’s innovations was much less dramatic than is often supposed. Without technological innovations there was a natural limit to productivity, even had there been no adverse factors such as population drop or damage from war and invasion. Nevertheless, the new system of assessment may have helped to ensure a higher rate of recovery of notional tax revenue, and to that extent will have been helpful to the state (and unpopular); it probably also increased, if only temporarily, the ratio of tax receipts in kind over taxes collected in cash.
But there were other problems to face, including continued inflation and a shortage of gold and silver in the treasury, which Diocletian and Constantine attempted to address by requiring the rich to commute precious metal for bronze. Matters were not helped however by the large-scale minting of bronze, or rather base-metal, coins (the bronze content was minimal) by the government in response to the collapse of the silver denarius, now a paper unit only; prices continued to spiral throughout Constantine’s reign as well as Diocletian’s. The latter’s most famous measure in the monetary sphere was his attempt to prescribe maximum prices by imperial decree (‘Price Edict’, or Edictum de maximis pretiis, AD 301). With its minute attention to detail, Diocletian’s edict provides us with our largest single source of information on the prices of ordinary goods. It could not succeed however in the absence both of an adequate mechanism for enforcement and of parallel regulation of supply. The disproportionate penalties it lays down conceal the fact that the means of enforcement simply did not exist. Hostile critics like Lactantius gloated when it was soon withdrawn:
this same Diocletian with his insatiable greed was never willing that his treasuries should be depleted but was always measuring surplus wealth and funds for largess so that he could keep whatever he was storing complete and inviolate. Since, too, by his various misdeeds he was causing prices to rise to an extraordinary height, he tried to fix by law the prices of goods put up for sale. Much blood was then shed over small and cheap items, and in the general alarm nothing would appear for sale; then the rise in prices got much worse until, after many had met their deaths, sheer necessity led to the repeal of the law. (DMP 7.5–7)
Diocletian’s attempt at price control was accompanied by equally unsuccessful measures to reform the coinage. Both failed because they were imposed from above without sufficient understanding or control of the general conditions which were in fact causing the difficulties. Lactantius uses a vocabulary and reflects a lack of economic understanding (‘economic rationality’) shared by all sides, which put strict limits on the ability of fourth-century emperors to manage the economy in any real sense. Diocletian’s measures went far beyond those of previous emperors in their imaginative perception of what was needed, and they were continued to some extent by Constantine, but modern references to a ‘command economy’ or a totalitarian state mistake the letter for the reality. Rather, we should read the threats of provincial governors directed against tax collectors who failed in their duty as a symptom of actual powerlessness.
By his administrative reforms, Diocletian also laid the foundations of the late Roman bureaucratic system, whose object was to achieve tighter governmental control of all aspects of running the empire – fiscal, legal and administrative. It may be doubted whether the new system achieved its aim, though the original conception cannot be blamed for that. First, provincial government was reorganized; military and civil commands were separated, and each province henceforth had both a military commander (dux) and a civil governor. The provinces themselves were reduced in size and greatly enlarged in number: according to Lactantius, ‘to ensure that terror was universal, Diocletian cut the provinces into fragments’ (DMP 7.4). In fact the aim was to secure greater efficiency by shortening the chain of communications and command, and in so doing to reduce the power of individual governors. Inscriptions show that the process took some time; a list in a manuscript from Verona, known as the Laterculus Veronensis, or Verona List, indicates how far it had gone shortly after Diocletian’s abdication in AD 305. To give only two examples, Britain now had four provinces, Spain six and ‘Africa’ seven; the twelve larger units (dioceses) were governed by equestrian ‘vicars’ (vicarii) representing the praetorian prefects, who at the end of the reign of Constantine lost their military role and became the heads of the civil administration. Many of the laws in the Theodosian Code are addressed by the emperors to the praetorian prefects, who then had the task of passing the information on to the provincial governors. The praetorian prefects varied in number but for much of the fourth century there were three, four after AD 395. Under Diocletian the prefect was effectively the emperor’s second-in-command, with military, financial, legislative and administrative responsibility; from Constantine’s reign the military side was put under magistri militum (Masters of the Soldiers), who had command of the army and to whom the duces (military commanders in the provinces) were answerable. Below the prefects and vicars were provincial governors of various ranks, with titles such as praeses, proconsul, consularis and corrector. Rome and, later, Constantinople too, were outside the system, being governed by prefects of their own (praefecti urbis, prefects of the city). The system sounds neat and tidy, but as A. H. M. Jones points out, in practice it was constantly being circumvented, with constitutions addressed to ordinary governors and other direct communication not observing the theoretical chain of command. As time went on it was also circumvented by other means – patronage, bribery and less obvious forms of corruption. One should also be careful not to make too many assumptions based on modern preconceptions; the late Roman administration is scarcely comparable to a modern bureaucracy.
This system of provincial government required large numbers of officials to run it. In addition there were the so-called palatini, the financial officers of the largitiones and the res privata, part of the comitatus (the imperial entourage), along with the eunuch officials of the sacrum cubiculum (emperor’s bedchamber), the quaestor sacri palatii (imperial secretary), the magister officiorum (Master of Offices), who originated under Constantine and had control of what may be called the secretariat (the scrinia, comprising the epistolae, the memoria and the libelli), and probably also the agentes in rebus, the imperial couriers, and the comes of the domestici, the palace guard – all, naturally, with their own staffs. This group, of which the above is a highly simplified and incomplete sketch, travelled with the emperor, as did the imperial mint and wagon trains of bullion and luggage of all kinds. It all sounds very impressive, but in fact it had developed piecemeal over a considerable period, so that there was much actual confusion and duplication of duties. The officials themselves were collectively regarded as belonging to a militia and received military rations and pay, which made imperial service highly desirable for the hard-pressed members of the town councils, especially as they then gained release from their tax burdens. The late Roman government had therefore to strike a balance that guaranteed that enough good men were recruited into the imperial service, while ensuring that a sufficient number of taxpayers remained.
There are many problems in understanding the late Roman administrative system, which maintained an uneasy balance between bureaucracy and patronage; in particular, the number of those who were actually involved, and who were thus removed from the productive base and had instead to be supported (‘idle mouths’, to adopt the term used by A. H. M. Jones), has often been seen as a major factor in economic decline. These questions are discussed further in Chapter VII; meanwhile, we can note that by no means all of the system later known actually originated with Diocletian, though he is usually blamed for creating a top-heavy bureaucracy, just as he is for increasing the army to a size impossible for the empire to sustain.
Many of the changes that were taking place during his reign were in fact more a matter of long-term evolution than of individual initiative. It is often suggested, for example, that senators were excluded from posts in the provincial administration under Diocletian, who, like many other third-century emperors, had himself risen through the ranks of the army. But epigraphic evidence shows that senators were never excluded altogether; the fact that they were few in number at this period is a result not so much of imperial prejudice as of the decentralized conditions of the third century, which disrupted the existing patronage system, brought military commanders increasingly to the fore, and diminished the importance of the senate as an institution by locating the centre of government elsewhere than at Rome. Large numbers of extra provincial governors were needed to run the vastly increased number of provinces under Diocletian, and it is not surprising if they were in the first instance mainly of equestrian origin; the majority of provinces were accordingly placed under equestrian praesides. The separation of civil and military commands also doubled the amount of personnel needed. But senators were still used, for instance as correctores, regional governors in Italy. The distinction of title was kept, and when senatorial governors were reintroduced into a number of provinces by Constantine they were called consulares to distinguish them from the praesides, all of which suggests that the changes came about more for reasons of convenience and circumstance than of principle.
At the same time as supposedly favouring those of bluff military origin like himself, Diocletian is credited with transforming the Roman empire into a kind of ‘oriental despotism’ by importing court ceremonial and titles from Sasanian Persia. Fourth-century writers state that he was the first emperor to demand homage in the form of adoratio (prostration), and that he wore gorgeous clothes and lived in oriental seclusion; the term dominus (‘lord’) was freely used alongside more traditional (but proliferating) Roman imperial titulature and everything to do with the emperor was referred to as ‘sacred’ or ‘divine’. Again this development had earlier antecedents; even during the first and second centuries there had been a noticeable change in the style of imperial rule, as the stance of first citizen adopted by Augustus gave way to a more monarchic perception. Diocletian’s immediate predecessors, especially Aurelian, had taken further steps in this direction, and his alleged innovations should be regarded rather as marking the culmination and recognition of an existing trend. The titles Jovius and Herculius taken by Diocletian and Maximian and their Caesars were part of a similar development; earlier third-century emperors had already associated themselves on their coins with Jupiter, Hercules, and Mars in particular, and Aurelian claimed a divine protector in Sol Invictus (‘the unconquered sun’), to whom he set up a great temple in Rome. It would be quite wrong to regard this as mere packaging; all the same, concern for their public image and its presentation was certainly an important part of the tetrarchic style, and the divine titulature played an important role.
Much more significant in the long run, however, was the failure of Diocletian and the tetrarchs to reverse the decline in Rome’s status as the centre of imperial rule. Though the empire was not formally divided under the tetrarchy, several ‘capitals’ developed in different parts of the empire, notably at Nicomedia, Diocletian’s main residence, Serdica (Sofia), Thessalonica, the main seat of Galerius, Sirmium in Pannonia, the seat of Licinius, and Trier in Germany, which was the residence of Constantius Chlorus, the father of Constantine. In practice, emperors in this period commonly spent their time moving from one residence to another: other centres which now came to prominence were Naissus (Nis), Carnuntum on the Danube, Milan and Aquileia in Italy. Rome is rarely if ever on the imperial itinerary. This travelling, together with the plurality of imperial centres (the term ‘capitals’ is misleading), had several important corollaries. First, it greatly weakened the hold of Roman tradition on government and administration and in a sense freed Diocletian and his colleagues and successors to introduce innovations. Second, it fostered imperial building and stimulated urban development, for each centre needed to have certain basic requirements. A typical ‘tetrarchic capital’ would have at the very least a palace with a substantial audience chamber and a hippodrome for the ruler’s public appearances, as well as for chariot racing; Diocletian retired to Split in the former Yugoslavia to a palace built in this style, and Constantine also followed the pattern when he transformed the existing city of Byzantium into Constantinople (AD 330). Some of these cities were very substantial, especially Nicomedia, where Diocletian was proclaimed emperor, Constantine was kept as a youth at the court of Diocletian, and Lactantius employed as a rhetor, and where there was also a notable Christian church. Since laws were issued wherever the emperor happened to be at the time, imperial travels can be at least partly traced from the dates and places recorded for each law. Finally, in the reign of Diocletian, each tetrarch had his own staff of officials (comitatus), his own court (sacrum cubiculum) and his own military guard, so that Lactantius can be forgiven for resenting the total increase in posts.
On 23 February, AD 303, the church at Nicomedia was destroyed by an official party led by the praetorian prefect, and on the next day, Eusebius says, Diocletian issued an edict ordering that churches should be destroyed and Christian Scriptures burnt; Christians holding public office were to be stripped of their rank and imperial freedmen who did not recant were to be reduced to slavery. Other orders quickly followed, which were put into practice in the east, demanding that bishops be imprisoned and compelled to sacrifice to the gods. Optatus, an African Catholic bishop of the later fourth century, preserves the record of what happened at Cirta in Numidia when the local official, who was both a pagan priest and the curator of the city, put the first decree into practice: the bishop and his clergy brought out all their church property, which included a rather large amount of men’s and women’s clothing and shoes, but the commissioner had to go to the ‘readers’ for the Scriptures themselves, obtaining from them about thirty copies described as ‘books’ and twenty-two smaller volumes (Optatus, Appendix I; Jones, History of Rome through the Fifth Century, no. 174). The persecution was very unevenly carried out: Maximian and Constantius Chlorus in the west evidently showed little enthusiasm for the policy, even if we disregard Eusebius’s apologia for the latter, but in the east many bishops and clergy were imprisoned and tortured or mutilated, and the bishop of Nicomedia and others were beheaded. The persecution made a deep impression on contemporary Christians. Lactantius’s pamphlet On the Deaths of the Persecutors (De mortibus persecutorum) was written when the persecution had ended and Constantine had defeated Maxentius; the work is a version of recent history designed to show beyond argument that God was indeed on the side of the Christians, and had horrible punishments in store for those who persecuted them. Soon after the ending of persecution in May, AD 311, Eusebius (who had escaped himself) wrote a moving account of what happened in his own province of Palestine, later incorporated into his Church History as book VIII; he had visited the ‘confessors’ (those who admitted to being Christians) who were imprisoned in Egypt, and saw some of them put to death. His own friend and mentor from Caesarea, Pamphilus, who was martyred in AD 310, was one of those whom Eusebius visited, assisting him to write while in prison a defence of the third-century Christian writer Origen, who had built up the great library at Caesarea. It has been pointed out that the overall numbers of those martyred during the persecution were small, and that its effects were geographically patchy, but Eusebius’s memorable account leaves no doubt as to the shock that was experienced by many eastern Christians.
There seems to have been little general support for the persecution; it was called off by Galerius in AD 311, and toleration declared for all religions by Constantine and Licinius in the so-called ‘Edict of Milan’ in AD 313 (Eusebius, Church History X.5; Lactantius, DMP 48). The motivation for the persecution itself is far from clear, though the sources confidently blame it on the influence of Galerius. The edict of AD 303 was preceded by a purge of Christians from the army, which itself is said to have followed an incident in AD 299 when diviners at an imperial sacrifice allegedly failed to find the right omens after some Christians who were present had made the sign of the cross. But whatever the immediate reasons, the attempt to control deviant belief and practice suited the ideology of the tetrarchy very well. Diocletian’s and Maximian’s adoption of the styles Jovius and Herculius was part of a heavy emphasis on moral and religious sanctions for their rule, and any sign of offence to the gods, as symbolically demonstrated by the failed divination, was interpreted as extremely dangerous for the future security of the empire. Exactly the same thinking in reverse lay behind Constantine’s adoption of Christianity; he presented himself as duty-bound by God to ensure correct worship throughout the empire, and as liable for personal punishment if he failed.
The style of government adopted by Diocletian and the tetrarchy was undoubtedly severe and authoritarian, at least in theory. Strict social and moral regulation was enjoined on all classes. Much legislation in the fourth century aimed at preventing coloni (tenants) from leaving their estates, keeping decurions (members of town councils) from abandoning their place of residence and ensuring hereditary succession in trades and crafts, and is expressed in luridly moralizing language typical of late Roman laws, and accompanied with threats of dire punishments for disobedience. If taken at face value, this legislation can look very much like the apparatus of a totalitarian state. We shall return to it later (see especially Chapter VII); for the moment it is enough to point out that there was a large gap between theory and practice, and that the motivation was something more immediate than social repression, namely the paramount need to ensure tax revenue and production in the face of actual governmental weakness. The old view, held for example by Jones, according to which Diocletian was credited with creating the institution of the ‘colonate’ and effectively tying the free population to the land, has increasingly come under criticism in recent years: well before Diocletian, private tenants in Egypt had paid their taxes through their landlord as intermediary, and it was perhaps this situation which Diocletian now made hereditary, thus regularizing an existing situation rather than imposing a new one. Nor did his legislation introduce a new and unified system for the whole empire; in contrast, current research emphasizes the regional variety which continued to hold in spite of the appearance of centralization sometimes given by the existence of the law codes.
The moralizing, threatening vocabulary of imperial legislation did however indeed become habitual; it is only too apparent from the pages of Ammianus, who employs the same kind of terminology for his own judgements. But the abundant evidence which is available from the reign of Constantine onwards, and especially from the later fourth century, suggests that hard though life might be, the regimentation preached by Diocletian and his colleagues did not in fact prevail.
Diocletian was nothing if not true to his aims: he abdicated together with his senior colleague Maximian on 1 May, AD 305, and retired to his palace at Split, refusing to return to political life thereafter. Lactantius, who wished to give him an exemplary death as a persecutor, claims that he starved himself to death in AD 311 or 312 (DMP 42), but other sources have him living longer. Diocletian had no direct heirs and the tetrarchy hardly survived his retirement. Constantine succeeded his father Constantius in AD 306, secured his position as Augustus by an alliance with Maximian in AD 307 and soon proceeded to work for the elimination of his rivals. One of those who fell victim to him was Maximian himself (AD 310), and he defeated Maximian’s son, Maxentius, in AD 312. Once sole emperor, Constantine was to set great changes in motion which have invited both contemporaries and modern historians to contrast him sharply with Diocletian; but he was himself a product of the tetrarchy and was in many ways Diocletian’s heir – many of the social, administrative and economic developments in his reign simply brought Diocletian’s innovations to their logical conclusion.
IV The New Empire: Constantine (#ulink_05ab2bb3-185f-5156-be67-e9269a2ec451)
EVEN MORE THAN Diocletian, Constantine suffers from bias in the verdicts of both ancient and modern commentators. The problem centres on his support for Christianity, which fundamentally changed the fortunes of the Christian church and may well be responsible for its later history as a world religion. Our main contemporary source, Eusebius of Caesarea, was the author of a Church History which turned into a glorification of Constantine, and later became Constantine’s panegyrist in his Life of Constantine. Lactantius, too, sharply differentiates the virtuous Constantine from the wicked Diocletian, although in his case at least, since he was writing his tract On the Deaths of the Persecutors (DMP), on any dating, before the final victory of Constantine over Licinius in AD 324, Licinius is allowed an equal rating with Constantine. The relevant Latin Panegyrics naturally give maximum credit to Constantine and arrange their historical material accordingly. For the secular aspects of the reign, we unfortunately depend a good deal on Zosimus’s New History, which is not only equally biased (albeit in the opposite direction) but also naively distorted. As for documentary proof, much of the evidence for Constantine’s legislation is contained only in the Life of Constantine by Eusebius, and thereby comes under some suspicion (see Chapter II). Finally, though the imperial letters on the subject of Donatism preserved in the Appendix to Optatus’s history of the Donatist controversy are now normally accepted as genuine (and if so are highly revealing of Constantine’s own mentality), we have to remember that they were preserved in a Catholic milieu and represent only one side of the controversy.
As for modern historians, one must be equally on the look-out for bias, open or hidden. Sometimes it takes a very overt form: as a saint of the Orthodox church and the founder of Constantinople, Constantine is often straightforwardly and favourably presented as the founder of Byzantine civilization; his contribution to its religious development is thus what is most emphasized. Others, especially the nineteenth-century German historian Jacob Burckhardt and the twentieth-century Belgian scholar Henri Grégoire, have sought to denigrate the integrity of Constantine by attacking the credibility of Eusebius, an approach that has provoked a defence both of Constantine and of Eusebius, notably by Norman Baynes, in his essay, Constantine the Great and the Christian Church. Since to write about Constantine at all entails choosing between the conflicting sources, or at least, taking a view about the credibility of Eusebius, the main Christian source, it is impossible to avoid being drawn into these controversies. Constantine is one of the most important figures in the history of the Christian church; given the significance of the latter in our culture, even apparently neutral studies tend at times to reveal a hidden agenda. A critical approach is therefore needed, though not necessarily an ultra-sceptical one.
First of all, Constantine has to be seen in the context of the tetrarchy. Born in AD 272 or 273, his father was Constantius, yet another Illyrian soldier who had risen to praetorian prefect and Caesar to Maximian, and who had been made Augustus on the latter’s abdication in AD 305. Constantine accompanied Diocletian and Galerius on a number of military expeditions. The Constantinian version, wishing to blacken Galerius, has it that he eventually eluded the suspicious emperor only by a ruse, escaping post-haste and finding his father already on his deathbed; in fact he found his father about to cross the Channel, and went with him to York, where on the latter’s death Constantine was proclaimed Augustus on 25 July, AD 306 by his father’s troops. The politics and the chronology of the events between the joint abdication of Diocletian and Maximian in AD 305 and Constantine’s defeat of Maxentius at the Battle of the Milvian Bridge in late October, AD 312, are extremely confused and difficult to establish, even though the tendentious literary sources can be supplemented by the evidence of coins and papyri, as well as by a few inscriptions. Constantine’s propaganda began early: an anonymous panegyrist of AD 307 shows him allying himself with Maximian (who had returned from his short-lived abdication) by marrying his daughter Fausta. The author ends by imagining that he is addressing Constantine’s dead father Constantius and envisaging the joy he must be feeling in heaven that Constantine has the same adopted father (Maximian, the senior Augustus in the Herculian line), while he and Maximian now share the same son (Pan. Lat. VI (7).14).
Though Lactantius claims that he was already pro-Christian (DMP 24), the same panegyric makes much of Constantine as a Herculian, stressing his claim to the divine titulature adopted by Maximian. By AD 310, however, things had changed dramatically: Maxentius, the son of Maximian, had seized Rome and Maximian himself, having turned on both Maxentius and Constantine, had committed suicide after Constantine had taken up arms against him. A further justification of Constantine’s position was now required, and an anonymous panegyric of AD 310 duly produces a novel claim to dynastic descent from the third-century emperor Claudius Gothicus, as well as crediting him with a symbolic vision of Apollo:
you saw, Constantine, I believe, your own Apollo, accompanied by Victory, offering you a laurel crown, signifying three decades of rule. (Pan. Lat. VII (6).21)
In the same year Mars gave way on Constantine’s coins to Sol Invictus, the sun-god, with whom Apollo was identified. This new step looked back to the pre-tetrarchic precedent set by Aurelian (AD 270–5), who issued coins commemorating his immediate predecessor, the deified Claudius Gothicus, and associated himself with the sun-god. Constantine now claimed legitimacy on grounds of dynastic descent in order to defend himself against charges of having broken away from the tetrarchy.
The truth was that the tetrarchy had already broken down, and that Constantine was looking to the future. In AD 311, the eastern Augustus Galerius called off the persecution on his deathbed and expired in great pain, to the satisfaction of Lactantius and other Christian writers. Maximin (Maximinus Daia, nephew of Galerius), who had been declared Augustus by his own troops, now seized Asia Minor from Licinius, who had been appointed Augustus at the Conference of Carnuntum in AD 308. Constantine had now to protect his position; in 312 he marched down through Italy, besieging Segusio, entering Turin and Milan and taking Verona. Maxentius came out from Rome to meet his army and Constantine inflicted a heavy defeat on his troops at the Milvian Bridge over the Tiber on 28 October, AD 312. Many of Maxentius’s soldiers drowned in the river and his own head was carried on a pike through Rome. Constantine entered Rome in triumph and addressed the anxious senators, many of whom had supported Maxentius, promising clemency. The battle was depicted as a great defeat of tyranny by justice, as is recorded on the inscription on the the Arch of Constantine, still standing near the Colosseum in Rome and erected for Constantine’s decennalia (tenth anniversary) in AD 315. Dedicated in honour of Constantine by the senate and people of Rome, the inscription reads:
by the inspiration of the divinity and by the nobility of his own mind, with his army he avenged the republic by a just war at one and the same time both from the tyrant and from all his faction.
The Arch is decorated with reliefs depicting the campaign and the entry to Rome: the siege of Verona, the defeat of Maxentius, with his soldiers drowning in the Tiber, Constantine’s address to the Senate and his bestowing of largess.
The defeat of Maxentius left Constantine in control of the west. In February, AD 313, he and Licinius met at Milan, where Licinius married Constantine’s sister Constantia; a few months later Licinius defeated Maximin, leaving himself and Constantine as sole Augusti, based in the east and west respectively. Maximin had renewed persecution in AD 312 (Eusebius, Church History IX.9), but like Galerius is alleged by Christian writers to have called it off again before his death (IX.10). The so-called ‘Edict of Milan’ (X.5; Lactantius, DMP 48), confirming religious toleration, is often attributed to Constantine alone, but is in fact an imperial letter sent out by Licinius in the east and issued by convention in joint names.
Not until AD 324, therefore, when he finally defeated Licinius at Chrysopolis, did Constantine become sole emperor. A preliminary and inconclusive clash took place at Cibalae in AD 316, after which the two Augusti patched up their alliance, declaring their three sons Caesars on 1 March, AD 317. Since Lactantius wrote his pamphlet On the Deaths of the Persecutors before the battle of Cibalae, and since Eusebius was living in the east under Licinius, his coverage for this period is thin; moreover, in Eusebius’s account of the campaign of AD 324 in the Life of Constantine biblical allusion and tendentious rhetoric take the place of factual detail. In AD 324 he hastily touched up his Church History, removed or altered as many of the favourable references to Licinius as possible and added a brief description of the final victory. For the rest of the reign the main source is the Life of Constantine, written much later and completed only after Constantine’s death in May, AD 337, which it describes. The character of the Life itself also changes when it reached this point in the narrative: so far it has followed, supplemented and subtly reshaped the narrative in Book IX of the Church History, but from now on the work (which is expressly described as a portrait of Constantine as a Christian emperor rather than a complete history of the reign) becomes a repository of information of very varied type and origin, all of which needs careful and detailed analysis.
Before turning to the subject of Constantine and Christianity, however, the extent of continuity between this period and the previous one first needs to be stressed. We are badly informed about Constantine’s secular policies; here too the evidence is more readily available for the period between AD 324 and 337. As we have seen, on the military front Constantine was blamed by pagan authors, especially Zosimus (II.34), for having weakened the frontier defences by taking troops away to serve in the field army. Clearly the military needs of the years AD 306–24 did imply the development of strong mobile forces, but this was in fact no innovation. In other respects too, for instance in the idea of a Persian campaign that he entertained in his last years, Constantine followed precedent. He also continued and consolidated Diocletian’s provincial and administrative arrangements, with the significant alteration that the praetorian prefects now lost their military functions. The reasons for, and the details of the change, which did not take place until the end of the reign, have been much disputed; it is probably attributable to the assignment of territorial areas to Constantine’s remaining sons and to two sons of his half-brothers in AD 335, but in any case it was a perfectly logical extension of Diocletian’s reforms. Similarly, the chief treasury minister henceforth, the comes sacrarum largitionum (literally ‘Count of the Sacred Largesses’), is first attested only in the latter part of the reign, and probably evolved in a similarly ad hoc fashion. Inflation continued under Constantine just as it had earlier. He was able to issue a new gold coin, the solidus, which was never debased and which remained standard until late in the Byzantine period; however, this does not indicate any fundamentally new economic measures so much as the fact that he had the necessary gold at his disposal. In part this came from the treasures of the pagan temples, which Eusebius tells us were confiscated, but it also derived from new taxes in gold and silver which were imposed on senators (the follis) and merchants (the chrysargyron, ‘gold-and-silver tax’):
he did not even allow poor prostitutes to escape. The result was that as each fourth year came round when this tax had to be paid, weeping and wailing were heard throughout the city, because beatings and tortures were in store for those who could not pay owing to extreme poverty. Indeed mothers sold their children and fathers prostituted their daughters under compulsion to pay the exactors of the chrysargyron. (Zos. II.38, writing after the tax had been abolished in AD 499)
The recent reforms were still working themselves through during the reign of Constantine, and if there was some sense of recovery, it was doubtless partly because the changes then introduced were now gradually being felt. The wars of Constantine’s early years also eventually gave way to his sole rule, which in itself brought respite and consolidation. One way however in which he seems at first sight to have dramatically departed from Diocletian’s precedent is in his use of senators in high office. According to Eusebius (VC IV. 1), Constantine greatly expanded the senatorial order, bestowing senatorial rank without the obligation to reside in Rome and attend meetings of the Senate itself. Later, a second Senate was founded at Constantinople, which had to be filled largely by new appointments. The role played by the new senators was however significantly different from that of senators in the early empire (see Chapter I). Interestingly, in view of their eclipse during the third century, Constantine used members of the great Roman families in his administration, as senatorial governors (consulares), as correctores, governors of provinces in Italy, as prefects of the city of Rome, and in the now largely honorific office of consul. Emulating their early imperial predecessors, these men were proud to record their offices on inscriptions, though the offices themselves were often different. The consul of AD 337, the year of Constantine’s death, was Fabius Titianus, who had been corrector of Flaminia and Picenum, consularis of Sicily, proconsul of Asia, comes primi ordinis (in Constantine’s comitatus), and was prefect of the city from AD 339–41 (ILS 1227, see Barnes, New Empire, 109). One of the consuls of AD 335 was Ceionius Rufius Albinus, son of Rufius Volusianus, who was himself consul in 311 and 314; the son survived exile for magic and adultery by Constantine in the fateful year 326 to become consularis of Campania, proconsul of Achaea and Asia, consul and prefect of the city (Barnes, New Empire, 108; for his father’s career, see 100).
This development gives the lie, incidentally, to the commonly held theory of estrangement between Constantine and the Roman Senate. It would be natural to suppose that Constantine surrounded himself with Christians, but few of his appointees, to these posts at least, are provably Christian. An exception is the famous Ablabius (cos. AD 331), a Cretan of humble birth who came to Constantine’s attention, rose to become praetorian prefect and had the honour of having his daughter betrothed to the emperor’s son Constans (see Barnes, New Empire, 104); but most were from the new aristocracy which emerged in Rome out of the third-century confusion. Constantine’s expansion of the senatorial order was extremely important; it was to provide the foundation of a further enlargement over the next two centuries, in the course of which the equestrian order effectively disappeared. But it can be seen as supplying a need rather than as an act of deliberate social policy, and it seems less of a reversal of Diocletianic policy when it is recognized that the latter had no provable animus against senators as such; nor is it likely that it was part of a deliberate effort by Constantine directed at conciliating the still-pagan Roman aristocracy.
Constantine’s legislation continued the tendencies already apparent under Diocletian, by further restricting the freedom of movement of decurions and coloni. The financial burdens on the former were considerable, as is clear from the difficulties Constantine had in enforcing his law exempting Christian clergy from service on the town councils (Euseb., Church History X.7) – their disgruntled fellow-townsmen, with their own burdens correspondingly increased, kept trying to enrol them and had to be repeatedly restrained. Ironically, Constantine also found himself legislating to control the numbers of those who now flocked to be ordained and gain these privileges for themselves; ordination was to be permitted only when a member of the clergy died, or if there was a vacancy for other reasons. Coloni too were forbidden to leave their estates; landlords harbouring such runaways must give them up, and if those whose coloni had left succeeded in recovering them, they were allowed to keep them in chains as if they were actually slaves (CTh. V. 17.1, AD 332).
Even in the religious sphere, Constantine was following good precedent in claiming to be under special divine protection; it is very possible that he initially saw the Christian God in the same light as Apollo and Sol Invictus, as a protector who would grant favours in return for his own attachment. At any rate, he continued to put Sol on his coins until as late as AD 320–1, although in his letter of AD 313 exempting Christian clergy from curial responsibilities he clearly identifies the maintenance of Christianity with the good of the empire, saying that by being so relieved of fiscal demands, they will
be completely free to serve their own law [i.e. Christianity] at all times. In thus rendering service to the deity, it is evident that they will be making an immense contribution to the welfare of the community. (Euseb., Church History
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