As to purgatory, the book Orpheus—A General History of Religions states: “St. Augustine had held that there was an intermediate state of probation between future felicity and damnation, that of the purification of souls by fire. This is the Orphic [pagan Greek] and Virgilian [pagan Roman] doctrine of Purgatory: there is not a word about it in the Gospels. . . . The doctrine of Purgatory . . . was formulated in the sixth century, and proclaimed a dogma of the Church by the Council of Florence (1439).”
The Watchtower Announcing Jehovah’s Kingdom. October 1, 1989 p. 6