The Lives of the Twelve Caesars by 2nd Century Roman historian Gaius Suetonius Tranquillus is our key primary source for biographical information of the first twelve rulers of ancient Rome - Emperors Julius Caesar, Augustus, Tiberius, Caligula, Claudius, Nero, Galba, Otho, Vitellius, Vespasian, Titus and Domitian. This new digital edition of The Lives of the Twelve Caesars includes an image gallery. Author Suetonius (70–130) - Gaius Suetonius Tranquillus - was a Roman historian belonging to the equestrian order who wrote during the early Imperial era of the Roman Empire. Translator John Carew Rolfe, Ph.D. (1859 - 1943) was an American classical scholar.