Gaius Julius Caesar Augustus (23 September 63 BC – 19 August AD 14) was the first emperor of the Roman Empire, which he ruled alone from 31 BC until his death in AD 14.These are the contemporary dates; Augustus lived under two calendars, the Roman Republican until 45 BC, and the Julian after 45 BC. Due to departures from Julius Caesar's intentions, Augustus restored the Julian calendar in 8 BC, and the correspondence between the proleptic Julian calendar and the actual calendar observed i… (More on Augustus)