Feast of the Immaculate Conception of the Blessed Virgin Mary The Gospel of the Feast of the Immaculate Conception of the Blessed Virgin Mary – Luke i. 26-28 Ineffabilis Deus – The Immaculate Conception (Bl. Pius IX – 1854) Dogmatic and Moral Subjects – The Immaculate Conception; The First Part of the Hail Mary (Luke i. 28)