Also, he probably spoke better Greek than Latin. And plus, the eastern provinces were a lot richer than the western provinces, and from a looting perspective, you just want to be closer to where the good warring is. The enemies in the east, like the Persian Parthians and the Persian Sassanians, were real empires, not just bands of warriors. And no matter who you were in world history, if you wanted to make a name for yourself in terms of war, you really needed to be up against the Persians. Even if you were the Mongols. Not this time, friends. As the political center of the Roman Empire shifted east, Constantine also tried to reorient his new religion, Christianity, toward the east, holding the first church council in Nicaea in 325.