The Lives of the Twelve Caesars
Suetonius![The Lives of the Twelve Caesars](https://support.digitalhusky.com/media/annotations/sorted/221/22125220/CHSBZCOP0322125220.jpg)
The Lives of the Twelve Caesars by 2nd Century Roman historian Gaius Suetonius Tranquillus is the key primary source of biographical information for the first twelve rules of ancient Rome - emperors Julius Caesar, Augustus, Tiberius, Caligula, Claudius, Nero, Galba, Otho, Vitellius, Vespasian, Titus and Domitian.