And Diocletian is viewed as a somewhat or a reasonably strong emperor. He's known as the last emperor that really persecuted the Christians because they didn't follow the Roman religion, they did not worship the emperor as a god. But he's also, or maybe he's most famous for, splitting the empire. He decides that probably one of the main causes of the Third Century Crisis is that the empire has gotten too vast, it has too many borders, it's hard for one emperor to administer the whole thing. So he splits it into east and west from an administrative point of view. They don't become separate empires, but he decides that he is going to rule from the east and that he will have a co-emperor who rules from the west. And not only does he set that up, but he sets up what's called a tetrarchy.