Editing Cassius Dio (section)

===Collections of book fragments===
The fragments of the first 36&nbsp;books have been collected in four ways:

;''Fragmenta Valesiana'': Fragments that were dispersed throughout various writers, scholiasts, grammarians, and lexicographers, and were collected by [[Henri Valois]]

;''Fragmenta Peiresciana'': Large extracts, found in the section entitled "Of Virtues and Vices", contained in the collection, or portative library, compiled by order of [[Constantine VII]] Porphyrogenitus. The manuscript of this belonged to [[Nicolas-Claude Fabri de Peiresc]].

;''Fragmenta Ursiniana'': The fragments of the first 34&nbsp;books, preserved in the second section of the same work by Constantine, entitled "Of Embassies". These are known under the name of ''Fragmenta Ursiniana'', as the manuscript in which they are contained was found in [[Sicily]] by [[Fulvio Orsini]].

;''Excerpta Vaticana'': ''[[Excerpta Vaticana]]'' by [[Angelo Mai]] contains fragments of Books&nbsp;1 to 35 and 61 to 80. Additionally, fragments of an unknown [[continuator]] of Dio (''Anonymus post Dionem''), generally identified with the 6th&nbsp;century&nbsp;CE historian [[Peter the Patrician]], are included; these date from the time of [[Constantine I|Constantine]]. Other fragments from Dio that are primarily associated with the first 34&nbsp;books were found by Mai in two Vatican manuscripts; these contain a collection that was compiled by [[Maximus Planudes]]. The annals of [[Joannes Zonaras]] also contain numerous extracts from Dio.