St. Marcellinus

St. Marcellinus was a priest of Rome who suffered martyrdom with St. Peter the Exorcist during the persecution of Diocletian in the early fourth century. Their feast is celebrated on 2 June, and their names entered the Roman Canon of the Mass, showing the deep antiquity of their veneration.

Marcellinus served as a priest, while Peter was known as an exorcist, one of the minor orders in the ancient Roman Church. Tradition says they were imprisoned for the faith and continued their ministry even in captivity. Their witness led to conversions, including members of the jailer’s household in some accounts.

The martyrdom took place outside Rome in a hidden place, probably to prevent Christians from honoring their bodies. According to tradition, they were taken to a forest, forced to dig their own graves, and then beheaded. Their executioner later revealed the location, allowing the faithful to recover and venerate their relics.

Pope St. Damasus later honored them with an inscription, and a basilica was built near their tomb on the Via Labicana. The devotion to them was not based on political importance but on the ordinary courage of Roman clergy who remained faithful when the empire demanded apostasy.

St. Marcellinus should be remembered together with St. Peter the Exorcist: priest and exorcist, servant of the sacraments and servant of deliverance, both witnessing that Christ is stronger than prison, secrecy, and death. Their inclusion in the Roman Canon placed their names on the lips of priests at the altar for centuries, binding their martyrdom to the Eucharistic prayer of the Church.

The pairing with Peter the Exorcist is important. Marcellinus represents priestly ministry, while Peter represents the Church’s prayer of deliverance; together they show the Roman clergy serving souls even when imprisonment and execution were imminent.

The devotion also shows how carefully Roman Christians guarded the memory of martyrs. Even when persecutors tried to erase the place of execution, the Church recovered the story, honored the bodies, and made the martyrs part of her prayer at the altar.

Their burial on the Via Labicana became part of the sacred geography of Christian Rome. Pilgrims did not remember Marcellinus as an isolated name but as one half of a priestly and deliverance ministry sealed in blood. His feast therefore keeps alive both Roman martyrdom and the Church’s confidence that Christ remains victorious in prison, secrecy, and death.