Pope St. Sylvester (c. 250-335 A.D.) was born in Rome and raised as a Christian under the care of pious parents, and the religious instruction of a devout priest. He was later ordained to Holy Orders in Rome, and witnessed the outbreak of Christian persecution under the Emperor Diocletian. During this time he became well-known as a good and holy priest, so much so that when the Pope died, Sylvester was appointed the new Bishop of Rome. Little is known about Pope St. Sylvester other than the many important events in Church history that occurred under his pontificate. He was the reigning pope during the Council of Nicea which condemned the Arian heresy and established the Nicene Creed; he was the Holy Father who converted and baptized the Roman Emperor Constantine; Rome's greatest churches were built under his direction by Constantine, including St. John Lateran, St. Peter's, and Santa Croce; and the Church saw the beginnings of temporal prosperity and the establishment of the Christian Roman Empire. Sylvester was Pope from 314 A.D. until his death in 335 A.D. His feast day is December 31st.