Pope Gregory I

Pope Gregory I, commonly known as Saint Gregory the Great, was the 64th Bishop of Rome from 3 September 590 until his death on 12 March 604.
Gregory was originally from Rome, a Roman senator's son, and himself the prefect of Rome at 30. He lived in a monastery that he established on his family estate before becoming a papal ambassador and then pope. During his papacy, his administration greatly surpassed that of the emperors Maurice and Theodosius in improving the welfare of the people of Rome. Gregory regained papal authority in Spain and France and sent missionaries to England, including Augustine of Canterbury and Paulinus of York. Gregory saw Franks, Lombards, and Visigoths align with Rome in religion from their Arian Christian alliances. The realignment of barbarian allegiance to Rome shaped medieval Europe. He also combated the Donatist heresy, popular particularly in North Africa at the time.
Gregory is also well known for his writings, which were more prolific than those of any of the previous popes. The epithet Saint Gregory the Dialogist has been attached to him in Eastern Christianity because of his Dialogues.