Constantine was a Roman Emperor who ruled in the early 300's AD, and was arguably one of the most powerful person in his part of the world. His conversion to Christianity had far reaching effects on the common practice of the religion and on all the factions of Christianity that are present today. His conversion happened during a war with a co-emperor, Maxentius. Constantine claimed that the night before a critical battle, in which he defeated this opponent, he had a vision of the Supreme God showing him the symbol of the cross and said, "Conquer by this." The cross was formed by the letters C (chi) and R (rho), the first two letters of the word C