But as we'll see, the splitting of the empire into east and west, even though it started as an administrative thing, over time it's going to become a real split and they're going to turn into two different empires. Now after Diocletian, you have another significant emperor. You have Constantine. And Constantine is known for many things. Maybe most famously, he embraced Christianity as opposed to Diocletian, who persecuted Christians. You have the Council of Nicaea and the Nicaean Code, where there's now a uniform church doctrine around Christianity. He has the Edict of Milan, which makes Christianity illegal under Roman rule.