Processus

Saint Processus was a saint and martyr of the first century at Rome. Together with Saint Martinian he is mentioned in the Roman Martyrology, in that of Bede and in others as one of the two principal jailers who guarded the Mamertine prison at Rome in the time of Nero, when the holy Apostles Peter and Paul were imprisoned there before their martyrdom.

According to these sources they were brought to the faith and baptized in the prison, together with forty-⁠seven other men and women. Both were beheaded on the Via Aurelia on 2 July, the day on which they are commemorated. The noble Roman woman Lucina had them taken and buried on her property, until the relics were moved to a church built in their honor. Practically nothing is known of his life, and the Catholic Encyclopedia doubts even that Peter and Paul were held in the Mamertine prison.