The Twelve Caesars, is a set of twelve biographies of Julius Caesar and the first 11 emperors of the Roman Empire written by Gaius Suetonius Tranquillus. The work, written in AD 121 during the reign of the emperor Hadrian, was the most popular work of Suetonius, at that time Hadrian's personal secretary, and is the largest among his surviving writings. The Twelve Caesars is considered very significant in antiquity and remains a primary source on Roman history.

A retelling of the lives and times of the Roman emperors traces how their reigns marked Rome's shift from a republic to an influential empire, offering a sequence of biographies that offers insight into the political and social dynamics of each ruler's time.

An analysis of Suetonius' account of the emperor Domitian. The book provides a detailed commentary on matters of historical importance in the text, together with a discussion of Suetonius' life. A comparison is offered between Suetonius' account and Dio's version. Latin sources are utilized.