Sept. 3: ST. GREGORY THE GREAT Pope, Monk, Doctor of the Church. Achievements. 6 min read St. Gregory the Great Sept. 3: ST. GREGORY THE GREAT Pope, Monk, Doctor of the Church. Achievements. catholicsstrivingforholiness September 3, 2021 Sept. 3: ST. GREGORY THE GREATPope, Monk, Doctor of the Church Inspiring biographical notes and achievements St.... Read More Read more about Sept. 3: ST. GREGORY THE GREAT Pope, Monk, Doctor of the Church. Achievements.