Publius (or Gaius) Cornelius Tacitus (ca. 56 – ca. 117) was a senator and a historian of the Roman Empire. 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 that reigned in the Year of the Four Emperors. These two works span the history of the Roman Empire from the death of Augustus in 14 AD to (presumably) the death of emperor Domitian in 96 AD. There are significant lacunae in the surviving texts.