Roman Empire By The great Christy 44 BCE Julius Caesar's Assassination 27 Augustus Caesar; rise of Roman Empire 30 Crucifixion of Jesus 35 Paul converts to Christianity 44 Assassination of Caesar 46 Julius Caesar dictator 133 Gracious brothers' reform attempts 146 Decline of Roman republic 180 Death of Emperor Marcus Aurelius; beginning of decline of Empire 313 Emperor Constantine Converts to Christianity