Michael Ghislieri, a Dominican friar from his fifteenth year, a teacher of religion at twenty, as a simple religious, as inquisitor, bishop, and cardinal, was famous both for the spotless purity of his own life and for his intrepid defense of the Church's faith and discipline. Surrounded in his time by great men and great Saints, in apostolic virtue he was surpassed by none.
Prayer (1962 Collect):
O God, You chose blessed Pius as Pope to overcome the enemies of the Church and to restore the beauty of sacred liturgy. May his prayers protect us and help us to persevere in serving You, so that we may avoid the snares laid by our enemies and enjoy everlasting peace. Through Our Lord . . .