The event is over.

We declare, pronounce and define that the doctrine which holds that the Blessed Virgin Mary was, from the first moment of her conception, by a singular grace and favor of Almighty God, in view of the merits of Jesus Christ, Savior of the human race , preserved unsullied from all taint of original sin, is a revealed doctrine of God, and thus must be firmly and constantly believed by all the faithful.

Pope Pius IX

Program at the Crypt of the Basilica:

15 p.m. Rosary

15:30 a.m. Solemn Mass