Gregory the Great
From Conservapedia
Gregory the Great, or Gregory I, was a Pope of the Roman Catholic Church who lived from AD 540 to 604 and served as Pope from 590 to 604 A.D. Britain was Christianized during his reign. Christened a saint shortly after his death, his feast day is March 12th. He is one of the four original Doctors of the Church.
Sources
The New American Desk Encyclopedia, Penguin Group, 1989
