bishop of Rome from May 308 to 309, succeeded Marcellinus, after a considerable interval, most probably in May or June 308.
Under Maxentius he was banished from Rome in 309 on account of the tumult caused by the severity of the penances he had imposed on Christians who had lapsed under the recent persecution. He died the same year, being succeeded by Eusebius. His relics are under the altar of San Marcello al Corso, in Rome. His feast day is commemorated on January 16.
Propers for Marcellus I - Bishop of Rome
O ALMIGHTY God, who hast called us to faith in thee, and hast compassed us about with so great a cloud of witnesses; Grant that we, encouraged by the good examples of thy Saints, and especially of thy servant Marcellus, may persevere in running the race that is set before us, until at length, through thy mercy, we with them attain to thine eternal joy; through him who is the author and finisher of our faith, thy Son Jesus Christ our Lord. Amen.
The Epistle - Philippians 4:4-9.
The Gospel - St. Luke 6:17-23.
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