'''Lucius''' (or '''Claudius''') '''Cassius Dio''' (alleged to have the [[cognomen]] '''Cocceianus'''),<ref>Dio's name: ''[[L'Année épigraphique]]'' 1971, 430 = Κλ΄ Κάδδιος Δίων. ''Roman Military Diplomas'', Roxan, 133 = ''L. Cassius Dio''.</ref><ref>[[Alain Gowing]], who has edited Cassius Dio, argues that the evidence for ''Cocceianus'' is insufficient, and the ascription is a Byzantine confusion with [[Dio Chrysostom]], whom Pliny shows to be named Cocceianus; he provides the previously unattested praenomen of ''Claudius''.</ref> ({{lang-grc|Δίων ὁ Κάσσιος}}, c. AD 155 – 235,<ref>[http://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/Introduction*.html Prof. Cary's Introduction at LacusCurtius]</ref><ref>According to some scholars, such as Millar (Millar, F., ''A study of Cassius Dio'', Oxford 1966, p. 13), he was born later, in 163/164.</ref> known in [[English language|English]] as '''Cassius Dio''', '''Dio Cassius''', or '''Dio''' (Dione. lib), was a [[Roman consul]] and noted [[historian]] who wrote in [[Greek language|Greek]]. Dio published a history of [[Ancient Rome|Rome]] in 80 volumes, beginning with the legendary arrival of [[Aeneas]] in [[Italy]]; the volumes then documented the subsequent [[founding of Rome]] (753 BC), the [[Roman Republic|formation of the Republic]] (509 BC), and the [[History of the Roman Empire|creation of the Empire]] (31 BC), up until AD 229. The entire period covered by Dio's work is approximately 1,400 years. Of the 80 books, written over 22 years, many survive into the modern age, intact, or as fragments, providing modern scholars with a detailed perspective on Roman history.