Caio Suetônio Tranquilo was born in Rome, presumably in the year 69 AD, and died around the year 141. Son of a tribune of the 13th Legion, he embraced both the military and literary careers. A contemporary and friend of Pliny, the latter wanted to introduce him to the career of public offices, which Suetonius modestly refused. He shone especially in the forum, having been one of the most eminent figures of the senatorial nobility. Appointed secretary ab epistolis during the time of Emperor Hadrian, he entered the intimacy of the court, where, however, he quickly fell out of favor for monopolizing the attentions of Empress Sabina. In his spare time from public duties, Suetonius dedicated himself to the study of history. A scholar of the customs of his people and his time, he wrote many scholarly works, in which he reviewed the main characters of the era. Above all, he was an indiscreet revealer of the intimacies of the Roman court, giving us an intimate and unceremonious view of the vices of the emperors and the petty quarrels that divided the nobility. His main works are: "De Ludis Grecorum" (On Greek Games); "De Spectaculis et Certaminibus Romanorum" (On Roman Spectacles and Contests); "De Anno Romano" (On the Roman Year); "De Nominibus Propiis et de Generibus Vestium" (On Proper Names and the Classes of Garments); "De Roma et ejus Institutis" (On Rome and Its Institutions); "Stemma Ilustrium Romanorum" (Stem of Illustrious Romans); "De Claris Rhetoribus" (On Famous Rhetoricians); and "A Vida dos Doze Césares" (The Lives of the Twelve Caesars). This is the only one that has survived to our days. Unfortunately, the others have been lost, which represented an incalculable historical loss, as we know they were valuable works for the study of classical antiquity, as the reader can observe from this precious work, "The Lives of the Twelve Caesars."