Visiting the Rocca Roveresca Fortress of Senigallia is like leafing through the pages of a history book that reveals the story of this seaside land that was once a bulwark. The work of construction of the city's fortifications was committed by Giovanni Della Rovere to the great architects Federico da Montefeltro Luciano Laurana and Baccio Pontelli. The second built the residential part and the access drawbridge; Pontelli, took care of the works closely related to defense, constituted by the quadrangular structure with massive corner towers, in addition to the finishing work of the ducal residence: the decorative elements of the windows, the moldings in the yard and indoors; the spiral staircase of the north tower. The present architectural complex is the result of reform and expansion interventions made through the course of the centuries since the first defensive tower dating back to Roman times, on which the medieval coastal tower of the 12th-13th centuries, the first fortress wanted by Cardinal Albornoz in the mid-14th century, together with  the Malatesta fortress (mid-15th century) and the Della Rovere fortress (end of the same century) were built.