He becomes a Christian. He says Christianity is legal. Theodosius now, right as we are about to enter into the fifth century, he makes Christianity the official religion of the Roman Empire. So in roughly 100 years, the Roman Empire went from persecuting Christians to making it the official religion, and actually going the other way, starting to persecute some of the pre-Christian religions or rituals. The other thing that happens as we enter into the fifth century now, as we go into the fifth century, you have the capital of the Western Empire is moved from Rome to Ravenna, but the idea that the emperors see all of these Germanic tribes, they feel threatened by them, that Ravenna is easier to defend. It's surrounded by a kind of marshy, swampy area. The other thing of note about Theodosius, and as we move into this, really the last century of the Western Roman Empire, is Theodosius was the last Roman emperor to rule all of Rome.