A city with an ancient history that begins with the Romans in the 2nd century BC, continues as a free municipality in the thirteenth century and then evolves into lordship with the Malatesta family, subsequently the Sforzas and later on the Della Rovere duchies . Many buildings bear witness to the rich and complex evolution of the city: Rocca Costanza, a military building from the late 1400s, the Duchy’s Palace, the most significant monument in the city built by Alessandro Sforza in the 1400s, the Mosca palace, an important 18th century residence which stands right beside the Antaldi palace now home to the Rossini National Museum.