This file includes both Plutarch's Lives (all 50 biographies and 18 comparisons) and "Lives of the 12 Caesars" by Suetonius. According to Wikipedia: "Plutarch's Lives of the Noble Greeks and Romans, commonly called Parallel Lives or Plutarch's Lives, is a series of biographies of famous men, arranged in tandem to illuminate their common moral virtues or failings, written in the late 1st century. The surviving Parallel Lives, as they are more properly and commonly known, contain twenty-three pairs of biographies, each pair consisting of one Greek and one Roman, as well as four unpaired, single lives. It is a work of considerable importance, not only as a source of information about the individuals biographized, but also about the times in which they lived." Also according to Wikipedia: "De vita Caesarum (Latin, literal translation: On the Life of the Caesars) commonly known as 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 Twelve Caesars is considered very significant in antiquity and remains a primary source on Roman history. The book discusses the significant and critical period of the Principate from the end of the Republic to the reign of Domitian; comparisons are often made with Tacitus whose surviving works document a similar period."