Page "Pope Mark" Paragraph 1

Little is known of his early life.

According to the Liber Pontificalis, he was a Roman, and his father's name was Priscus.

Some evidence suggests that the early lists of bishops and martyrs known as the Depositio episcoporum and Depositio martyrum were begun during his pontificate.

He issued a constitution confirming the power of the Bishop of Ostia to consecrate newly-elected popes.

He is credited with the foundation of the Basilica of San Marco in Rome, and a cemetery church over the Catacomb of Balbina, just outside the city.