Lives of the Noble Grecians and Romans or Parallel Lives is a series of biographies of famous men, arranged in tandem to illuminate their common moral virtues or failings, probably written at the beginning of the second century AD by Plutarch. Parallel Lives comprises 23 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 described, but also about the times in which they lived. Volume I contains 13 pairs of biographies from Theseus and Romulus to Cimon and Lucullus, with comparisons.