The scenery of Piazza del Popolo guards the oldest public building in town, Palazzo dei Priori, that seems to lure the passer-by’s gaze thanks to its peculiar fan-shaped opening. The sixteenth-century façade in cotto tile is divided by the string courses that harmoniously divide it into three parts both vertically and horizontally. In the middle of the façade a double staircase converges in the loggia, topped by a bronze statue of Pope Sixtus V. The building, born as Priors’ seat, the magistrates chosen among the most influential citizens of the six contrade (city quarters) that still divide the historic centre, was also the Municipality’s seat and today it’s an important museum complex.