This is the certified Priesthood course workbook used by the Shrine of the Irish Oak Inc. for the ordination of new Celto-Roman priests. Successfully completing these lessons and assignments will qualify a person for ordination into the Shrine of the Irish Oak's Temple priesthood as a priest or priestess of one's chosen Deities or a certificate of course completion in the field of Celto-Roman Paganism if you are just studying our tradition to advance your knowledge.