They were jailers in the Roman prison that held Sts Peter and Paul, and came to faith in Christ through the witness of the two holy Apostles. After receiving baptism, Processus and Martinian released the saints from prison. As the Apostles were leaving Rome, the Lord appeared to Peter on the Appian way. When Peter asked him where he was going, he replied, 'To Rome, to be crucified once again.' Abashed, the Apostles returned to Rome to face their martyrdom. Processus and Martinian were beheaded along with St Paul.