Palazzo dei Sette
Was built in the thirteenth century. It originally belonged to some noble families, but then passed to the Commune and became the seat of the “Signori Sette”, who were among the city’s most important magistrates. Under the popes it became the Papal Seat, and the Commune later used it as the Governor’s residence. Next to it is the square tower known as the “Torre del Papa” (the Pope’s Tower).