During the time of the Emperors Marcus Aurelius and Carolus, the Senate began to demand more power returned to it. In OTL the quick succession of Emperors made their demands impossible to give way to and the despotic nature of these Emperors made them unlikely to give them, anyway. After the death of Marcus Aurelius and Carolus ceasing power from Marcus's adopted son, Commodus, there was a time of deliberation which Carolus took. The Constitution of the Roman Empire, the first written constitution in the world, made by Carolus established, formally, the division between provinces to be governed by the Senate, to give them power, and those governed by the Emperor, to give the provinces defense. Imperial provinces were markedly more centralized because they tended to have few cities. The exc