Augustus
Augustus (; 23 September 63 BC – 19 August AD 14) was a Roman statesman and military leader who was the first Emperor of the Roman Empire, controlling Imperial Rome from 27 BC until his death in AD 14. His status as the founder of the Roman Principate has consolidated an enduring legacy as one of the most effective and controversial leaders in human history.
Reign of Marcus Aurelius
Although Marcus Aurelius shows no personal affection for Hadrian (significantly, he does not thank him in the first book of his "Meditations"), he presumably believed it his duty to enact the man's succession plans. Thus, although the senate planned to confirm Marcus Aurelius alone, he refused to take office unless Lucius received equal powers. The senate accepted, granting Lucius the "imperium", the tribunician power, and the name Augustus. Marcus Aurelius became, in official titulature, Imperator Caesar Marcus Aurelius Antoninus Augustus; Lucius, forgoing his name Commodus and taking Marcus Aurelius' family name, Verus, became Imperator Caesar Lucius Aurelius Verus Augustus. It was the first time that Rome was ruled by two emperors.