The Holy Martyrs Onesimus, Alphaeus, Philadelphus, Cyprian, Erasmus and 14 others with them, lived during the third century and came from Italy. Alphaeus, Philadelphus and Cyprian were sons of a governor in Italy, named Vitalius. They were enlightened by faith in Christ and baptized by Saint Onesimus.
During this period the emperor Licinius gave orders to seek out Christians and hand them over for torture. The brothers went to Rome together with Onesimus, Erasmus and fourteen other Christians. At Rome they crushed the chest of Saint Onesimus with a heavy stone, which killed him. Erasmus and the fourteen Martyrs were beheaded.