Emperor of Rome

The Emperor of Rome is the most powerful man in the Roman Empire. An emperor would be chosen in various ways. You could be made a legal heir to the throne, as it was with Caligula, once Emperor Tiberius died. You could inherit it if you were the son of an emperor as was the case with Marcus Aurelius, who passed the throne to his son Commodus upon his death. A third way you could take it was by force as shown by generals such as Septimius Severus.