The Assumption of Mary is the traditional belief held by Christians of the Roman Catholic, Eastern Orthodox, Oriental Orthodox, and some Protestant churches such as Lutheranism and Anglo-Catholic Anglicans that the Virgin Mary at the end of her life was physically taken up into heaven. The Roman Catholic Church teaches as dogma that the Virgin Mary, "having completed the course of her earthly life, was assumed body and soul into heavenly glory." This means that it claims that Mary was transported into Heaven with her body and soul united. This doctrine was dogmatically and infallibly defined by Pope Pius XII on November 1, 1950, in his Apostolic Constitution Munificentissimus Deus. The feast day recognizing Mary's assumed passage into Heaven is celebrated as The Solemnity of the Assumption of the Blessed Virgin Mary by Roman Catholics, and as the Dormition by Orthodox Christians. In those denominations that observe it, the Assumption is a major festival, commonly celebrated on August 15. This is a Holy Day of Obligation in many Roman Catholic jurisdictions.