 In the sixteenth century the land was ruled by the cardinals of the Sacred College through the office of the podestà, while by the end of the sixteenth century, with the administrative reform of the papal state introduced by Sisto V, the center was submitted directly to the Apostolic Chamber, from the pontiff himself and was governed by a resident apostolic commissioner.For this reason, as in other centers of the papal state (see the case of Rieti and Terni), beside the aisle palace, the headquarters of the local government, was built the apostolic palace, the peripheral seat of the central government, with the residence of the governor and the annexed jails, an expression of the judicial power that the governor exemplified.The population of the castle, which at the end of the fifteenth century was composed of just five hundred souls.