It has a hut-shaped façade in which an oculum was added in the 19th century. The interior, on the Latin cross plan, has kept the medieval transept and presbytery, with remains of the 14th-century Sienese school in the main chapel and others from the 15th century in the side chapels, recently discovered and hypothetically attributed to Francesco di Giorgio Martini. Pieve of San Giovanni Battista, built in the mid-13th century in Romanesque-Gothic style.