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When did Pope Pius XII declare the Assumption of Mary a Roman Catholic dogma?
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Mary
Madonna and Child, oil and tempera on panel by Antonello da Messina, 1475; in the National Gallery of Art, Washington D.C.
Pope Pius XII declared the Assumption of Mary to be a Roman Catholic dogma on November 1, 1950.1
He made this declaration official in the apostolic constitution Munificentissimus Deus, stating that "the Immaculate Mother of God, the ever Virgin Mary, when the course of her earthly life was run, was assumed in body and soul to heavenly glory".12