Pope Urban I
Pope Urban I (222–230 C.E.) was the seventeenth Pope, the official title is the Bishop of Rome of the Catholic Church. His reign was a peaceful one and there not much known about it. He served as head of the Catholic church during the imperial reign of Alexander Severus. He is buried in the cemetary at Callistus on the Appian Way. He is considered a saint of the Catholic Church and his feast day is celebrated on May 25.
- Catholic Encyclopedia, (NY:Robert Appleton Company) 
- Richard P. McBrien, Lives of the Popes: The Pontiffs from St. Peter to John Paul II, (San Francisco:Harper San Francisco, 1997), pp. 44-45