St. Marcellinus and St. Peter

Saints Marcellinus and Peter (sometimes called Peter the Exorcist) were two 4th century Christian martyrs in the city of Rome. Marcellinus was a priest and Peter an exorcist. They were arrested and imprisoned in the persecution of Emperor Diocletian. In the prison, they converted Arthemius, the jailer, and his wife and daughter.  Both martyrs were beheaded by order of the magistrate Serenus. Pope St. Damasus I wrote the epitaph for their tomb, and the Emperor Constantine the Great erected a basilica in their honor. They are mentioned in the First Eucharistic Prayer. Their feast is celebrated on June 2.