Emperor of Rome in the early 4th Century. Converting to Christianity, he made the Christian faith legal, protecting it from further persecution. He convened the Council of Nicea in 325. He moved his administrative capital from Rome to Byzantium, which he renamed Constantinople.
Constantine is a 2005 film based on the Hellblazer comic book, with some plot elements being taken from the "Dangerous Habits" arc (issues #41-46). It was released on February 8, 2005 in Hong Kong, and on February 18, 2005 in the U.S. and Canada.