In the 4th century there was a Pope named Mark

    

Pope St. Mark

Facts

Feastday: October 7
Death: 336

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Pope, successor to St. Sylvester I , elected January 18, 336. He was the son of Priscus and a priest of Rome. During his pontificate he erected two basilicas on land donated by Emperor Constantine I. He died in Rome on October 7 after only eight months. His cult is now confined to local calendars.