Standing at the entrance to the town, the high walls and five polygonal towers of this 14C fortress are remarkably well preserved. A parapet walk offers strollers wide-reaching views of the city. The keep is no longer lodgings for officers and noblem..

The Town Hall, which stands on the aptly named People's Square, consists of a 13C palace, surmounted by a belfry and flanked by a handsome 14C-15C arcaded loggia.

The interior features an original, wainscotted nave, divided by three arches. Near the entrance is a large gilded wooden tabernacle dating from the 16C.

The façade of this 14C Romanesque-Gothic church reveals a rose window and an elegant marble doorway. Venture inside and admire the 14C frescoes by the Sienese School, in particular the Scourging of Christ and Scenes from the Passion by unknown ar..

The museum contains not only a number of prehistoric and Etruscan objects and a collection of ceramic ware, but also paintings and polychrome wooden statues by the Sienese School, together with religious artefacts from the nearby abbey of Sant'Antimo..