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.