By Franciscan Media - The Story of the Solemnity of the Assumption of Mary - On November 1, 1950, Pope Pius XII defined the Assumption of Mary to be a dogma of faith: “We pronounce, declare and define it to be a divinely revealed dogma that the immaculate Mother of God, the ever Virgin Mary, having completed the course of her earthly life, was assumed body and soul to heavenly glory.”