Pope Pius XII and Mary’s August Mysteries by Radio - August 15, 2018 By Stephanie Mann | On Nov. 1, 1950, Pope Pius XII defined the Assumption of Mary to be a dogma of faith in the apostolic constitution Munificentissimus Deus. He proclaimed Aug. 15 a Holyday of Obligation as a Solemnity. Less… About radio Will Pennsylvania be the... US Bishops Invite Vatican...