Cover of a 1698 edition of the Historia Augusta from Ettal Abbey
|Original title||Historia Augusta|
|Disputed, possibly 4th century|
The Augustan History (Latin: Historia Augusta) is a late Roman collection of biographies, in Latin, of the Roman Emperors, their junior colleagues and usurpers of the period 117 to 284. It presents itself as a compilation of works by six different authors (collectively known as the Scriptores Historiae Augustae), written in the reigns of Diocletian and Constantine I, but the true authorship of the work, its actual date, and its purpose, have long been matters for controversy.
Major problems include the nature of the sources it used, and how much of the content is pure fiction. Despite these conundrums, it is the only continuous account for much of its period and is thus continually being re-evaluated, since modern historians are unwilling to abandon it as a unique source of possible information, despite its obvious untrustworthiness on many levels.
Title and scope
The name originated with Isaac Casaubon, who produced a critical edition in 1603, working from a complex manuscript tradition with a number of variant versions. How widely the work was circulated in late antiquity is unknown, but its earliest use was in a Roman History composed by Quintus Aurelius Memmius Symmachus in 485. Lengthy citations from it are found in authors of the 6th and 9th centuries, and the chief manuscripts also date from the 9th or 10th centuries. (The editio princeps was published in Milan in 1475.) The six Scriptores – "Aelius Spartianus", "Iulius Capitolinus", "Vulcacius Gallicanus", "Aelius Lampridius", "Trebellius Pollio", and "Flavius Vopiscus (of Syracuse)" – dedicate their biographies to Diocletian, Constantine and various private persons, and so ostensibly were all writing c. the late 3rd and early 4th century.
The biographies cover the emperors from Hadrian to Carinus and Numerian. A section covering the reigns of Philip the Arab, Decius, Trebonianus Gallus, Aemilian and all but the end of the reign of Valerian is missing in all the manuscripts, and it has been argued that biographies of Nerva and Trajan have also been lost at the beginning of the work, which may suggest the compilation might have been a direct continuation of Suetonius. (It has also been theorized that the mid-3rd-century lacuna might actually be a deliberate literary device of the author or authors, saving the labour of covering Emperors for whom little source material may have been available.)
Despite devoting whole books to ephemeral or in some cases non-existent usurpers, there are no independent biographies of the Emperors Quintillus and Florian, whose reigns are merely briefly noted towards the end of the biographies of their respective predecessors, Claudius Gothicus and Tacitus. For nearly 300 years after Casaubon's edition, though much of the Augustan History was treated with some scepticism, it was used by historians as an authentic source – Edward Gibbon used it extensively in the first volume of the Decline and Fall of the Roman Empire. However, "in modern times most scholars read the work as a piece of deliberate mystification written much later than its purported date, however the fundamentalist view still has distinguished support. (...) The Historia Augusta is also, unfortunately, the principal Latin source for a century of Roman history. The historian must make use of it, but only with extreme circumspection and caution."
The dating problem
In 1783, Edward Gibbon had observed that there was something wrong with the numbers and names of the imperial biographers, and that this had already been recognised by older historians who had written on that subject. A clear example was the referencing of the biographer 'Lampridius' (who was apparently writing his biographies after 324) by 'Vopiscus', who was meant to be writing his biographies in 305-6. Then in 1889, Hermann Dessau, who had become increasingly concerned by the large number of anachronistic terms, Vulgar Latin vocabulary, and especially the host of obviously false proper names in the work, proposed that the six authors were all fictitious personae, and that the work was in fact composed by a single author in the late 4th century, probably in the reign of Theodosius I. Among his supporting evidence was that the life of Septimius Severus appeared to have made use of a passage from the mid-4th-century historian Aurelius Victor, and that the life of Marcus Aurelius likewise uses material from Eutropius. In the decades following Dessau, many scholars argued to preserve at least some of the six Scriptores as distinct persons and in favor of the first-hand authenticity for the content. As early as 1890, Mommsen postulated a Theodosian 'editor' of the Scriptores' work, an idea that has resurfaced many times since. Hermann Peter (editor of the Augustan History and of the Historicorum Romanorum reliquiae) proposed 330, based upon an analysis of style and language.
Others, such as Norman H. Baynes, abandoned the early 4th century date but only advanced it as far as the reign of Julian the Apostate (useful for arguing the work was intended as pagan propaganda). In the 1960s and 1970s however Dessau's original arguments received powerful restatement and expansion from Sir Ronald Syme, who devoted three books to the subject and was prepared to date the writing of the work closely in the region of 395 AD. Other recent studies also show much consistency of style, and most scholars now accept the theory of a single late author of unknown identity.
"Computer-aided stylistic analysis of the work has, however, returned ambiguous results; some elements of style are quite uniform throughout the work, while others vary in a way that suggests multiple authorship. To what extent this is due to the fact that portions of the work are obviously compiled from multiple sources is unclear. Several computer analyses of the text have been done to determine whether there were multiple authors. Many of them conclude that there was but a single author, but disagree on methodology. However, several studies done by the same team concluded there were several authors, though they were not sure how many." 
Primary and secondary Vitae
A unique feature of the Augustan History is that it purports to supply the biographies not only of reigning Emperors but also of their designated heirs or junior colleagues, and of usurpers who unsuccessfully claimed the supreme power. Thus among the biographies of 2nd-century and early 3rd-century figures are included Hadrian's heir Aelius Caesar, and the usurpers Avidius Cassius, Pescennius Niger and Clodius Albinus, Caracalla's brother Geta and Macrinus's son Diadumenianus. None of these pieces contain much in the way of solid information: all are marked by rhetorical padding and obvious fiction. (The biography of Marcus Aurelius's colleague Lucius Verus, which Mommsen thought 'secondary', is however rich in apparently reliable information and has been vindicated by Syme as belonging to the 'primary' series).
The 'secondary' lives allowed the author to exercise free invention untrammelled by mere facts, and as the work proceeds these flights of fancy become ever more elaborate, climaxing in such virtuoso feats as the account of the 'Thirty Tyrants' said to have risen as usurpers under Gallienus. Moreover, after the biography of Caracalla the 'primary' biographies, of the emperors themselves, begin to assume the rhetorical and fictive qualities previously confined to the 'secondary' ones, probably because the secondary lives were written after the Caracalla.
The biography of Macrinus is notoriously unreliable, and after a partial reversion to reliability in the Elagabalus, the life of Alexander Severus, one of the longest biographies in the entire work, develops into a kind of exemplary and rhetorical fable on the theme of the wise philosopher king. Clearly the author's previous sources had given out, but also his inventive talents were developing. He still makes use of some recognized sources – Herodian up to 238, and probably Dexippus in the later books, for the entire imperial period the Enmannsche Kaisergeschichte – but the biographies are increasingly tracts of invention in which occasional nuggets of fact are embedded.
Genre and purpose
Interpretations of the purpose of the History also vary considerably, some considering it a work of fiction or satire intended to entertain (perhaps in the vein of 1066 and All That), others viewing it as a pagan attack on Christianity, the writer having concealed his identity for personal safety. Syme argued that it was a mistake to regard it as a historical work at all and that no clear propaganda purpose could be determined. In his view the History is primarily a literary product – an exercise in historical fiction (or 'fictional history') produced by a 'rogue scholiast' catering to (and making fun of) the antiquarian tendencies of the Theodosian age, in which Suetonius and Marius Maximus were fashionable reading and Ammianus Marcellinus was producing sober history in the manner of Tacitus. (The History implausibly makes the Emperor Tacitus (275-276) a descendant and connoisseur of the historian.) In fact in a passage on the Quadriga tyrannorum — the 'four-horse chariot of usurpers' said to have aspired to the purple in the reign of Probus — the History itself accuses Marius Maximus of being a producer of 'mythical history': homo omnium verbosissimus, qui et mythistoricis se voluminibis implicavit ('the most long-winded of men, who furthermore wrapped himself up in volumes of historical fiction'). The term mythistoricis occurs nowhere else in Latin.
Of considerable significance in this regard is the opening section of the life of Aurelian, in which 'Flavius Vopiscus' records a supposed conversation he had with the City Prefect of Rome during the festival of Hilaria in which the Prefect urges him to write as he chooses and invent what he does not know.
A peculiarity of the work is its inclusion of a large number of purportedly authentic documents such as extracts from Senate proceedings and letters written by imperial personages. Records like these are quite distinct from the rhetorical speeches often inserted by ancient historians – it was accepted practice for the writer to invent these himself – and on the few occasions when historians (such as Sallust in his work on Catiline or Suetonius in his Twelve Caesars) include such documents, they have generally been regarded as genuine; but almost all those found in the Historia Augusta have been rejected as fabrications, partly on stylistic grounds, partly because they refer to military titles or points of administrative organisation which are otherwise unrecorded until long after the purported date, or for other suspicious content. The History moreover cites dozens of otherwise unrecorded historians, biographers, letter-writers, knowledgeable friends of the writers, and so on, most of whom must be regarded as figments of the author's fertile and fraudulent imagination.
Examples of falsehood
The untrustworthiness of the HA stems from the multifarious kinds of fraudulent (as opposed to simply inaccurate) information that run through the work, becoming ever more dominant as it proceeds. The various biographies are ascribed to different invented 'authors', and continue with the dedicatory epistles to Diocletian and Constantine, the quotation of fabricated documents, the citation of non-existent authorities, the invention of persons (extending even to the subjects of some of the minor biographies), presentation of contradictory information to confuse an issue while making a show of objectivity, deliberately false statements, and the inclusion of material which can be shown to relate to events or personages of the late 4th century rather than the period supposedly being written about. For example:
- The biography of Geta states he was born at Mediolanum on 27 May; the year is not specified but it was 'in the suffect consulships of Severus and Vitellius'. He was actually born at Rome on 7 March 189; there was no such pair of suffect consuls in this or any other year; however, it has been suggested that the names for these persons be amended to be Severus and Vettulenus, and that these men were suffect consuls sometime before 192.
- A letter of Hadrian written from Egypt to his brother-in-law Servianus is quoted at length (and was accepted as genuine by many authorities well into the 20th century). Servianus is saluted as consul, and Hadrian mentions his (adopted) son Lucius Aelius Caesar: but Hadrian was in Egypt in 130, Servianus's consulship fell in 134, and Hadrian adopted Aelius in 136. The letter is said to have been published by Hadrian's freedman Phlegon, with the letter's existence not mentioned anywhere except in the HA, in another suspect passage. A passage in the letter dealing with the frivolousness of Egyptian religious beliefs refers to the Patriarch, head of the Jewish community in the Empire. This office only came into being after Hadrian put down the Jewish revolt of 132, and the passage is probably meant in mockery of the powerful late 4th-century Patriarch, Gamaliel. Christian theologian Joseph Barber Lightfoot argued for the authenticity of the letter since it doesn't state it was written in Egypt (132) and that an alternative date for the adoption of Aelius was on or before 134.
- Decius revives the office of Censor; the Senate acclaims Valerian as worthy to hold it in a decree dated 27 October 251. The decree is brought to Decius (on campaign against the Goths) and he summons Valerian to bestow the honour. The revival of the censorship is fictitious, and Decius had been dead for several months by the date stated.
- Valerian writes to 'Zosimius', procurator of Syria (otherwise unknown) instructing him to furnish the young Claudius with military equipment including a pair of aclydes. The aclys (a kind of Homeric javelin) is a weapon only found in poetry (e.g. Virgil, Aeneid VII.730).
- Valerian holds an imperial council in Byzantium, attended by several named dignitaries, none of them otherwise attested and some holding offices not known to exist until the following century, at which the general 'Ulpius Crinitus' (a name apparently chosen to evoke the military glories of the Emperor Trajan) takes the young Aurelian (destined to be another military Emperor) as his adopted son. There are no grounds to believe this is anything other than invention.
- In the Tyranni Triginta, the author 'Trebellius Pollio' sets out to chronicle 'the 30 usurpers who arose in the years when the Empire was ruled by Gallienus and Valerian' (I, 1). The number 30 is evidently modelled on the notorious 'Thirty Tyrants' who ruled Athens after the end of the Peloponnesian War. The chapter contains 32 mini-biographies. They include two women, six youths, and seven men who never claimed the imperial power; one usurper of the reign of Maximinus Thrax, one of the time of Decius, and two of the time of Aurelian; and a number who are entirely fictitious: Postumus the Younger, Saturninus, Trebellianus, Celsus, Titus, Censorinus, and Victorinus Junior.
- The Emperor Tacitus is acclaimed by the Senate, meeting in the 'Curia Pompiliana' (no such building) and after orations by the consul 'Velius Cornificius Gordianus' (no such person) and 'Maecius Faltonius Nicomachus' (ditto: most of the 'Maecii' in the HA are invented), he goes to the Campus Martius and is presented to the troops by the Prefect of the City 'Aelius Cesettianus' (no such person) and the Praetorian Prefect 'Moesius Gallicanus' (ditto: the HA has several invented 'Gallicani'). Private letters commending Tacitus are quoted from the senators 'Autronius Tiberianus' and 'Claudius Sapilianus' (no reason to believe in them, either).
- In the Quadrigae Tyrannorum, the author includes Firmus, said to have been a usurper in Egypt under Aurelian. There is no certainty that this person ever existed; however, there was a Corrector named Claudius Firmus stationed in Egypt in 274, about the time Zosimus states that Aurelian was dealing with some trouble in that province. Nevertheless, the HA's wealth of detail about him is wilful invention. For example, he would eat an ostrich a day, he had a carriage drawn by ostriches, he would swim among crocodiles, he built himself a house fitted with square panels of glass.
- In the Life of Probus (Ch.XXIV, 1-3), the author 'Flavius Vopiscus of Syracuse' states that the Emperor's descendants (posteri) fled from Rome and settled near Verona. There a statue of Probus was struck by lightning, a portent according to soothsayers 'that future generations of the family would rise to such distinction in the senate they all would hold the highest posts', though Vopiscus (supposedly writing under Constantine) says this prophecy has not yet come to pass. This is one of the strongest indications of the HA's late 4th-century date, as it seems to be a fairly transparent allusion to the rich and powerful senator Sextus Claudius Petronius Probus (consul in 371) whose two sons held the consulship together in 395. Petronius Probus was born in Verona.
Marius Maximus or 'Ignotus'?
Certain scholars have always defended the value of specific parts of the work. Anthony Birley has argued, for instance, that the lives up to Septimius Severus are based on the now-lost biographies of Marius Maximus, which were written as a sequel to Suetonius' Lives of the Twelve Caesars. As a result, his translation of the History for Penguin Books covers only the first half, and was published as Lives of the Later Caesars, Birley himself supplying biographies of Nerva and Trajan (these are not part of the original texts, which begin with Hadrian).
His view (part of a tradition that goes back to J. J. Müller, who advanced Marius's claims as early as 1870) was vigorously contested by Ronald Syme, who held that virtually all the identifiable citations from Marius Maximus are essentially frivolous interpolations into the main narrative source, which he postulated was a different Latin author whom he styled 'Ignotus ("the unknown one"), the good biographer'. He argued, firstly, that as Marius wrote a sequel the Lives of the Twelve Caesars, his work covered the reigns from Nerva to Elagabalus; consequently, this would not have included a biography of Lucius Verus, even though the biography of that Princeps in the History is mainly of good quality. Secondly, that 'Ignotus' only went up to Caracalla, as is revealed by the inferior and mostly fictitious biography of Macrinus. Finally, that the composer of the Historia Augusta wrote the lives of the emperors through to the Caracalla (including Lucius Verus) using Ignotus as his main source, and supplementing with Marius Maximus on occasion. It was only when that source failed he turned to other inferior sources (such as Herodian and Maximus), as well as his own fertile imagination, and it was at this juncture that he composed the first five minor lives, through to the Geta.
Ever since it was first published the Historia Augusta has been known not to be particularly reliable, and modern scholars have tended to treat it ..."with extreme circumspection and caution" Older historians, such as Edward Gibbon, not fully aware of its problems, generally treated the information preserved within it as authentic.
For instance, in Gibbon's account of the reign of Gallienus, he uncritically reproduces the Historia Augusta's biased and largely fictional account of that reign. So when Gibbon states "The repeated intelligence of invasions, defeats, and rebellions, he received with a careless smile; and singling out, with affected contempt, some particular production of the lost province, he carelessly asked, whether Rome must be ruined, unless it was supplied with linen from Egypt, and arras cloth from Gaul", he is reworking the passage in the The Two Gallieni:
I am ashamed to relate what Gallienus used often to say at this time, when such things were happening, as though jesting amid the ills of mankind. For when he was told of the revolt of Egypt, he is said to have exclaimed "What! We cannot do without Egyptian linen!" and when informed that Asia had been devastated both by the violence of nature and by the inroads of the Scythians, he said, "What! We cannot do without saltpetre!" and when Gaul was lost, he is reported to have laughed and remarked, "Can the commonwealth be safe without Atrebatic cloaks?" Thus, in short, with regard to all parts of the world, as he lost them, he would jest, as though seeming to have suffered the loss of some article of trifling service.
Gibbon then noted after this passage: "This singular character has, I believe, been fairly transmitted to us. The reign of his immediate successor was short and busy; and the historians who wrote before the elevation of the family of Constantine could not have the most remote interest to misrepresent the character of Gallienus." Modern scholars now believe that Gallienus was one of the main architects of the later Roman imperial structure, and that his reforms were built upon by succeeding emperors.
Nevertheless, it is unwise to dismiss it altogether as it is also the principal Latin source regarding a century of Roman history. For example, scholars had assumed that Veturius Macrinus mentioned in the Life of Didius Julianus was an invention of the author, like so many other names. However, an inscription was uncovered which confirmed his existence and his post as Praetorian Prefect in 193. Likewise, the information that Hadrian's Wall was constructed during Hadrian's reign is recorded by no other extant ancient writer apart from the Historia Augusta.
Criticism of the current mainstream view
Not all scholars have accepted the theory of a forger working around the last decades of the 4th century or the beginning of the 5th. Arnaldo Momigliano and A.H.M. Jones were the most prominent 20th century critics of the Dessau-Syme theory amongst English-speaking scholars. Momigliano, summarizing the literature from Dessau down to 1954, defined the question as "res iudicanda" (i.e. "a matter to be decided") and not as "res iudicata" ("a matter that has been decided"). Momigliano reviewed every book published on the topic by Sir Ronald Syme, and provided counter arguments to most if not all of Syme’s arguments. Alan Cameron rebutted a number of Syme's and Barnes's arguments for a composition date c.395-400, suggesting a composition date between 361 and the 380s.
- Thirty Tyrants (Roman) – about the Tyranni Triginta, one of the books of the Historia Augusta
- Titus Aurelius Fulvus
- Enmannsche Kaisergeschichte
- Ernst Breisach, Historiography: Ancient, Medieval, and Modern, 3rd ed. (Chicago: University of Chicago Press, 2007), 75.
- David Magie, Introduction to the Loeb translation, p. xi.
- Birley, A. Lives of the Later Caesars (1988), p. 20
- Magie, pp. xxiv-xxv.
- Birley, A. Lives of the Later Caesars (1988), p. 9
- Birley, A. Lives of the Later Caesars (1988), p. 9
- Birley, A. The Augustan History in Latin Biography (1967), pgs. 125-130
- Syme, R. Historia Augusta Papers (1983), p. 118-119; Emperors and Biography (1971) p. 277
- Barnes, T., The Sources of the Historia Augusta (1978), p. 12
- The Cambridge History of Classical Literature: Volume 2, Latin Literature, Part 5, The Later Principate, E. J. Kenney, Wendell Vernon Clausen, pp43, 45, Cambridge University Press, 1983,ISBN 0521273714
- Birley, A. Lives of the Later Caesars (1988), pp. 7
- Birley, A. Lives of the Later Caesars (1988), p. 11
- Magie, p. xxxii; Syme (1971), p. 1.
- Syme (1971), p. 2.
- Momigliano (1984), p. 113.
- Hornblower, S.; Spawforth, A.; Eidinow, E., The Oxford Classical Dictionary (2012), p. 691
- Prickman, Greg; Head of Special Collections & University Archives at the University of Iowa Libraries, (2013) The Atlas of Early Printing "Ninth Century - The Text"
- Syme (1971), pp. 54ff.
- Syme (1971), pp. 56-7.
- Birley, A. Lives of the Later Caesars (1988), pp. 13-14
- Syme, R., Historia Augusta Papers (1983), pp. 44, 211, 214
- Syme (1971), pp. 57-9.
- Syme (1971), pp. 146ff.
- Birley, A. Lives of the Later Caesars (1988), p. 14
- Syme, R., Historia Augusta Papers (1983), pgs. 12-13
- Syme, R., Historia Augusta Paper (1983), p. 214
- Historia Augusta, Quadr. tyro 1. 2
- Syme (1971), p. 76.
- Syme (1968), p. 192.
- Potter, D. Literary Texts and the Roman Historian (2005), p. 150; Campbell, J., The Roman Army, 31 BC-AD 337: A Sourcebook (1994), p. 248
- Mehl, A., Roman Historiography (2011), p. 21
- Potter, D. Literary Texts and the Roman Historian (2005), p. 149
- Hadas, M., History of Latin Literature (2013), pp. 356-357; Rohrbacher, D., The Play of Allusion in the Historia Augusta (2016), pp. 6-8; Syme, R. Historia Augusta Papers (1983), pp. 113-114
- Syme, R. Historia Augusta Papers (1983), pp.98-99
- Birley, A. Lives of the Later Caesars (1988), pp. 13-14
- Birley, A. Lives of the Later Caesars (1988), p. 12-16
- Historia Augusta, Geta, 3. 1
- Syme, R., Ammianus and the Historia Augusta (1968), p.123
- Birley, A. Two Names in the Historia Augusta in Historia 15 (1966), pp. 249-253
- Raschke, M., New Studies in Roman Commerce with the East in Politische Geschichte (Provinzen und Randvölker: Mesopotamien, Armenien, Iran, Südarabien, Rom und der Ferne Osten), (1976), pp. 761-762
- Habelt Verlag, R., Bonner Historia-Augusta-Colloquium, Volume 4 (1968), p. 121
- Syme, R., Ammianus and the Historia Augusta (1968), p.60
- R. Syme, Emperors and Biography, pp. 21–24.
- "The Christian Ministry",Joseph Barber Lightfoot, p70, org pub 1868
- Historia Augusta, Valeriani Duo, 5.4 - 6.1
- Syme, op. cit., p. 215
- Syme, op. cit., p. 216
- Den Hengst, D. Emperors and Historiography (2010), p. 97
- Bunson, M., A Dictionary of the Roman Empire (1991), p. 414
- Cancik, H.; Schneider, H.; Salazar, C., Brill's New Pauly: Encyclopaedia of the Ancient World. Antiquity, Volume 14 (2009), p. 91
- Den Hengst, D. Emperors and Historiography (2010), p. 159
- Kreucher, G., Der Kaiser Marcus Aurelius Probus und seine Zeit (2003), p. 105
- Smye, R. Emperors and Biography (1971), p. 4 & p. 12
- Syme, R. Historia Augusta Papers (1983), p. 117
- Baldwin, B. Studies on Late Roman and Byzantine History, Literature, and Language (1984) p. 4
- Syme, op. cit., pp. 238–239
- Historia Augusta, Quadrigae Tyrannorum, 3.1; Aurelian 32.2
- Barnes, T., The Sources of the Historia Augusta (1978), p. 71
- den Boeft, J., et. al., Philological and Historical Commentary on Ammianus Marcellinus XXIX (2013), p. 150
- Historia Augusta, Quadrigae Tyrannorum, 3.2 - 6.5
- Claudian, Panegyricus de consulatu Probini et Olybrii, 143-146
- Jones, A.; Martindale, J.; Morris, J. The Prosopography of the Later Roman Empire, Vol. I (1971), p. 739
- Birley, A. Lives of the Later Caesars (1988), pp. 14-15
- Syme, R., Historia Augusta Papers (1983), p. 33; Birley, A. Lives of the Later Caesars (1988), p. 15
- Syme, R., Historia Augusta Papers (1983), pp. 31-33
- Syme, R. Historia Augusta Papers (1983), p. 32
- Syme, R., Historia Augusta Papers (1983), pp. 32-33
- Syme, R. Historia Augusta Papers (1983), pp. 31-32
- Syme, R., Historia Augusta Papers (1983), p. 44
- The Cambridge History of Classical Literature: Volume 2, Latin Literature, Part 5, The Later Principate, E. J. Kenney, Wendell Vernon Clausen, pp. 43, 45, Cambridge University Press, 1983,ISBN 0521273714
- Bray, J. J., Gallienus: A Study in Reformist and Sexual Politics (1997), pp. 3-4
- Gibbon, E., Decline and Fall of the Roman Empire, Vol I, Ch. 10
- Historia Augusta, Gallieni Duo, 6.1-6.8
- Gibbon, E., Decline and Fall of the Roman Empire, Vol I, Ch. 10, Note 156
- Bray, J. J., Gallienus: A Study in Reformist and Sexual Politics (1997), p. 4
- Mellor, R. The Roman Historians (2002), pg. 163
- Birley, A. Lives of the Later Caesars (1988), p. 13
- See publications by Momigliano in the bibliography; A.H.M. Jones, The Later Roman Empire, Oxford, 1964, p.1071n.1; also cited in the preface of Birley's translation, but with disagreement
- See publication by Momigliano in the bibliography
- Cameron 2011: 743ff
An English translation of the complete work (by David Magie, London & Harvard 1921) with facing Latin text, is available in the Loeb Classical Library. Partial translation by Anthony Birley as Lives of the Later Caesars in Penguin Books.
- Baynes, Norman H. The Historia Augusta. Its Date and Purpose (Oxford, 1926)
- Alan Cameron, The Last Pagans of Rome (Oxford, 2011)
- Momigliano, Arnaldo. “An Unsolved Problem of Historical Forgery: The Scriptores Historiae Augustae.” Journal of the Warburg and Courtauld Institutes 17, no. 1/2 (1954): 22-46. In JSTOR
- Momigliano, Arnaldo. “Review: Ammianus and the Historia Augusta by Ronald Syme.” The English Historical Review 84, no. 332 (1969): 566-569. In JSTOR
- Momigliano, Arnaldo. “Review: Emperors and Biography. Studies in the Historia Augusta by Ronald Syme.” The English Historical Review 88, no. 346 (January 1, 1973): 114-115. In JSTOR
- Momigliano, Arnaldo. “Ammiano Marcellino e la Historia Augusta (a proposito del libro di Ronald Syme).” In Quinto contributo alla storia degli studi classici e del mondo antico, 1:93-103. Roma, 1975.
- Momigliano, Arnaldo (1984). Secondo Contributo Alla Storia Degli Studi Classici. Ed. di Storia e Letteratura. Retrieved 20 August 2012.
- Syme, Ronald. Ammianus and the Historia Augusta (Oxford, 1968)
- Syme, Ronald. Emperors and Biography (Oxford, 1971)
- Syme, Ronald. Historia Augusta Papers (Oxford, 1983)
- Latin Wikisource has original text related to this article: Historia Augusta
- Latin text and English translation at LacusCurtius
- Latin text with concordance and frequency list at the IntraText Digital Library
- Latin text at The Latin Library
- Livius.org: Introduction