Although Marcus showed 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 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 became, in official titulature, Imperator Caesar Marcus Aurelius Antoninus Augustus; Lucius, forgoing his name Commodus and taking Marcus's family name Verus, became Imperator Caesar Lucius Aurelius Verus Augustus. It was the first time that Rome was ruled by two emperors.