You are hereHomeBARSeptember/October 1978How It Came About: From Saturday to Sunday The Cult of Sol Invictus (Leiden: E. J. Brill, 1972) 26. The study is part of the series on Oriental Religions in the Roman Empire edited by the greatest living authority on the subject, M. J. Vermaseren. Join the BAS Library! Already a library member? Log in here. Institution user? Log in with your IP address.