Saint Gregory the Great (AD 540–AD 604) was born into Roman nobility and was prefect of Rome before converting the family estate into a monastery dedicated to St. Andrew, where he remained until AD 579, when he was appointed as apocrisiarius to Constantinople. He began his papacy in AD 590 under the name Pope Gregory I.
Gregory was a great leader, with successful missionary campaigns that changed the reach of Christianity in Europe. He was also an able reformer, and was known as “the Father of Christian Worship” for his work in developing the liturgy of his day. Upon his death, he was immediately declared a saint by popular acclamation, and is venerated as a saint in the Roman Catholic, Eastern Orthodox, Anglican and some Lutheran churches. Much of Gregory’s abundant work has survived, including Morals on the Book of Job and Dialogues.