In 1985 Classical historian Georg Luck, in his "Arcana Mundi: Magic and the Occult in the Greek and Roman Worlds", theorised that the origins of the Witch-cult may have appeared in late antiquity as a faith primarily designed to worship the Horned God, stemming from the merging of Cernunnos, a horned god of the Celts, with the Greco-Roman Pan/Faunus, a combination of gods which he posits created a new deity, around which the remaining pagans, those refusing to convert to Christianity, rallied and that this deity provided the prototype for later Christian conceptions of the Devil, and his worshippers were cast by the Church as witches.