Suetonius,
The Lives of the Twelve Caesars…
“ In vain would history be ransacked for a parallel to this emperor, who united the most shameful vices to the most extravagant vanity, the most abject meanness to the strongest but most preposterous ambition; and the whole of whose life was one continued scene of lewdness, sensuality, rapine, cruelty, and folly. It is emphatically observed by Tacitus, "that Nero, after the murder of many illustrious personages, manifested a desire of extirpating virtue itself." ”
