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More famously known as Constantine the Great, Flavius Valerius Constantinus was born in the year 285. He ruled as Caesar in the year 306 upon the death of his father Constantius and reigned until his own death in 337. He waged war upon Maxentius in the year 311, winning major battles across Italian lines until he killed Maxentius at the Battle of the Milvian Bridge. In the year 324, Constantine I killed his co-emperor, Licinius, uniting the two sides of the Roman empire into one land. With the Edict of Milan in 313, he promised that all faiths would be tolerated, ending the dark and bloody era of Christian persecution under Diocletian. In the year 325, he sponsored the Council of Nicaea, which forever linked Rome and the Christian Church. He died in the year 337. He was the last Roman emperor to rule the whole Roman world for a lengthy time.