He was a Pope and Doctor of the Church. He was the sixty-sixth Pope, and one of the greatest leaders the Catholic Faith has ever had. He reigned as Roman Pontiff for fourteen years. His mother, Sylvia, was a saint, as were his aunts, Saint Aemiliana and Saint Tarsilla. Saint Gregory revived for the Catholic Church its great love for liturgical chant and music. Saint Gregory sent Saint Augustine of Canterbury to be the apostle of England, in 597.