They were twin brothers and deacons of the Church at Rome who were martyred under Diocletian.

Saints Mark and Marcellinus being led to Martyrdom,
by Paolo Veronese (1528–1588) source
They were twin brothers and deacons of the Church at Rome who were martyred under Diocletian.

Saints Mark and Marcellinus being led to Martyrdom,
by Paolo Veronese (1528–1588) source
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