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DIO CASSIUS (or, in Roman style, Cassius Dio) was Greek – born at Nicaea, in the Roman province of Bithynia. He was a Roman senator, and author of ‘Romaika’ – a history of Rome, written in Greek, from its legendary beginnings up to his own times. It is from casual comments he makes within the work that some details of his life are known.
Traditionally, Dio's full name is given as Cassius Dio Cocceianus. The attachment of ‘Cocceianus’ is due to Dio Cassius, purportedly, being the grandson of, Greek philosopher and orator, Dio Cocceianus (perhaps better known as Dio Chrysostom – ‘Chrysostom’ meaning ‘Golden Mouthed’). This connection, however, which is certainly not made by Dio Cassius himself, may be the result of medieval, Byzantine, confusion, and therefore spurious. It is more likely that his full name was Lucius Cassius Dio, as suggested by a Latin military diploma (though a Greek honorary inscription might tend to suggest it was Claudius Cassius Dio).Dio's father, Cassius Apronianus, had been a successful senator – achieving a consulship and a number of governorships (Dio had accompanied him on his governorship of Cilicia). Dio himself became a senator under Commodus (180–192). In 193, Pertinax nominated him for the praetorship. Pertinax's reign, however, lasted only three months, so it was under Septimius Severus (193–211) that Dio served his year in office.
Dio records (Book LII Chapter 20) that, since the rule of Augustus (31BC–AD14), the minimum age for senators was 25, and praetors 30. If Dio entered the senate at the beginning of Commodus' rule then the date of his birth was c.155. If, however, he became praetor at the age of 30, then his birth might be as late as 164.He had the dubious pleasure of spending the winter of 214/5, at Nicomedia in his native Bithynia, in the company of, Severus' son and successor, Caracalla (211–217). He was put in charge of the cities of Pergamum and Smyrna by Macrinus (217–218) – a position he retained under Elagabalus (218–222). At some stage (c.205 seems the most popular suggestion, though c.222 also has its advocates) Dio had been consul, and, early in Alexander Severus' reign (222–235), following a period of illness spent in Bithynia, he served as proconsul of Africa. He went on to govern Dalmatia, then Upper Pannonia. In 229, he was consul, for the second time, as colleague of Alexander. Dio Cassius had felt it necessary to be a firm disciplinarian with his troops in Pannonia, and, as a result, the Praetorian Guard were hostile towards him. There was fear that his life might be under threat, so he was obliged to spend his time away from Rome. Soon, however – he says because he had a foot ailment – Dio asked Alexander to excuse him, and he retired to his native country, where he, presumably, died at some time in the 230s.
Dio Cassius, himself, tells how it came about that he wrote his ‘Roman History’:
“After this [the assassination of Commodus] there occurred most violent wars and civil strife. I was inspired to write an account of these struggles by the following incident. I had written and published a little book about the dreams and portents which gave [Septimus] Severus reason to hope for the imperial power; and he, after reading the copy I sent him, wrote me a long and complimentary acknowledgment. This letter I received about nightfall, and soon after fell asleep; and in my dreams the Divine Power commanded me to write history. Thus it was that I came to write the narrative with which I am at this moment concerned. And inasmuch as it won the high approval, not only of others, but, in particular, of Severus himself, I then conceived a desire to compile a record of everything else that concerned the Romans. Therefore, I decided to leave the first treatise no longer as a separate composition, but to incorporate it in this present history, in order that in a single work I might write down and leave behind me a record of everything from the beginning down to the point that shall seem best to Fortune. This goddess gives me strength to continue my history when I become timid and disposed to shrink from it; when I grow weary and would resign the task, she wins me back by sending dreams; she inspires me with fair hopes that future time will permit my history to survive and never dim its lustre; she, it seems, has fallen to my lot as guardian of the course of my life, and therefore I have dedicated myself to her. I spent ten years in collecting all the achievements of the Romans from the beginning down to the death of Severus [i.e. 211], and twelve years more in composing my work. As for subsequent events, they also shall be recorded, down to whatever point it shall be permitted me.”
‘Romaika’ Epitome of Book LXXIII Chapter 23
The ‘History’ originally consisted of 80 books. Today, only the section from Book XXXVI to Book LX (inclusive) remains, more or less, intact. The rest exists as fragments (excerpts), and in abridged versions of some sections – known as the ‘Epitomes’ – from two authors:
- In the 1070s, Xiphilinus, a Byzantine monk, made an ‘Epitome’ of Books XXXVI to LXXX, and he is the main authority for Books LXI to LXXX (events post Claudian invasion of Britain).
- Byzantine chronicler, Zonaras, who, in the early-12th century, incorporated a considerable amount of Dio Cassius in his historical compendium, ‘Epitome Ton Istorion’. This is particularly important for Books I to XXI.
Translation by Earnest Cary.