The narrow, short street leads down from the main gate of the fortress to the Chiesa di Sant'Agostino with its simple 13th-century, Romanesque façade. Adjacent to the church is the former convent, now the Musei Riuniti, both a civic and diocesan museum, housing among its collections: a wooden crucifix by an unknown artist of the Sienese school, two 15th century wooden sculptures, including a Madonna by an anonymous artist,[2] and several terracotta sculptures attributed to the Della Robbia school. The collection also includes a St Peter and St Paul by Ambrogio Lorenzetti and a Virgin and Child by Simone Martini.