The cathedral of Pitigliano began as a simple parish church, dedicated to S. Mark the Evangelist. In 1509, Pope Julius II raised the parish church to the dignity of a collegiate church, dedicated to Ss. Peter and Paul.Bruscalupi, Monographia storica della contea di Pitigliano, p. 17. It was administered by a Chapter, composed of an Archpriest and eight Canons.
