No. 905 Diocese of Marbel, Philippines 05 December 2016
Mary was conceived without sin by St. Anne.
Pius IX defined this dogma f Immaculate Conception on 8 December 1854 in his Apostolic Constitution “Ineffabilis Deus”.
“We declare, pronounce, and define that the doctrine which holds that the Most Blessed Virgin Mary, in the first instant of her Conception, by a singular grace and privilege granted by Almighty God in view of the Merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of original sun, is a doctrine revealed by God and therefore t be believed firmly and constantly by all the faithful” (D.S. 2803, The New Dictionary of Theology, p. 508).