To offer them liturgical worship, he composed Masses and Offices in their honor and had the first Feast of the Holy ... society dedicated to the Immaculate Heart of Mary, at the Church of Our ...

The Solemnity of the Immaculate Conception of Mary was later fixed at December 8, nine months prior. This feast day was introduced in Rome from ... The antiphon for the Canticle of Zechariah at ...