Saint Gregory was elected as the 63rd Pope of Rome after the death of the Apostles in the year 590. He was known for his writings, especially the Dialogues, and his almsgiving. He initiated the first major missionary effort among the Anglo-Saxons. He made several important contributions to both Eastern and Western liturgy—developing the Divine Liturgy of the Presanctified Gifts and Gregorian Chant. He reposed in 604. His feast is celebrated on March 12; it is transferred out of Lent to September 3 in the Roman Church. He is known variously as Gregory the Great, Gregory I, and Gregory Dialogus.