Publius (or Gaius) Cornelius Tacitus (ca. 56 – ca. 117) was a senator and a historian of the Roman Empire. 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.