The surviving portions of his two major works-the Annals and the Histories-examine the reigns of the Roman Emperors Tiberius , Claudius , Nero , and those who reigned in the Year of the Four Emperors ( AD 69 ) .
The surviving parts of his two major works-the Annals and the Histories-report about the reigns of the Roman Emperors Tiberius , Claudius , Nero , Galba , Otho , Vitellius , and Vespasian .