The Mass marked the 400th anniversary of the canonizations of the Jesuit Sts. Ignatius of Loyola and Francis Xavier, as well as Sts. Isidore of Madrid; Teresa of Avila, founder of the Discalced Carmelites; and Philip Neri, founder of the Oratorians.
At a ceremony in St. Peter’s Basilica March 12, 1622, Pope Gregory XV formally recognized the holiness of Sts. Teresa of Avila, Ignatius of Loyola, Isidore of Madrid (also known as Isidore the Farmer), Francis Xavier and Philip Neri.