Historia Augusta, Volume IThe Historia Augusta is a biographical work, roughly following the model of the imperial biographer Suetonius, and covering the lives of the Roman emperors from Hadrian (r. 117138) to Carinus (r. 283285), with a lacuna between the lives of the Gordians and the Valerians. Although the work comes down to us as a collection of thirty books written by six different authors, it is now generally considered to be the creation of a single individual writing