Pope Gregory I (c. 540 – March 12, 604), also known as Gregory the Great, was the 64th Bishop of Rome (Pope) from 590 to 604. Born into a wealthy Roman patrician family, he served as Prefect of Rome before becoming a Benedictine monk. As pope, he reformed the liturgy, promoted Gregorian chant, sent missionaries to England, and wrote influential theological works such as Moralia in Job and Regula Pastoralis. He is considered one of the most important popes of the early Middle Ages, shaping Western Christianity profoundly.