"San Francesco"- construction of the church was begun in 1287, is in Piazza Vera, with a cloister and a convent, which was added in the 14th century, and renovated with some Renaissance influences in the 16th. The church is capped with an impressive dome that dates to the 11th century and was modified in the 17th century. There is also a bell tower, rebuilt in 1932, while the Romanesque-Gothic façade was finished in 1401-1406. Inside are housed sculptures by Duccio, and some Baroque material from the 17th and 18th century; the noteworthy Geraldini Chapel is from the 15th century.