St. Cletus (1st c.) and St. Marcellinus (3rd c.) were both Romans, popes, and martyrs who ruled the Holy See during the terrible persecution of Christians at the hands of the Roman Empire. St. Cletus was a convert and disciple of St. Peter the Apostle who became the third Bishop of Rome from 76 to 89 A.D., under the reigns of Roman Emperors Vespasian and Titus. His name appears in the Roman...