For 10 points, name this first Christian Roman emperor, a man who moved the capital to a self-named city in Byzantium.
This man waged war against Maxentius and Licinius and he's not Octavian, but he was promoted to the rank of Augustus at Eboracum. One year after this Tetrarch's vision at the Battle of the Milvian Bridge, he issued the Edict of Milan. This man called the First Council of Nicaea and was baptized on his deathbed. For 10 points, name this first Christian Roman emperor, a man who moved the capital to a self-named city in Byzantium.
This man waged war against Maxentius and Licinius and he's not Octavian, but he was promoted to the rank of Augustus at Eboracum.
{Constantine} I [or {Constantine} the {Great}]