the rites and religion ascribed to Orpheus as founder
See Orphism in American Heritage Dictionary 4
(ôrˈfĭzˌəm)
noun
An ancient Greek mystery religion arising in the sixth century B.C. from a synthesis of pre-Hellenic beliefs with the Thracian cult of Zagreus and soon becoming mingled with the Eleusinian mysteries and the doctrines of Pythagoras.
often orphism A short-lived movement in early 20th-century painting, derived from cubism but marked by a lyrical style and the use of bold color.