Collegiata di Sant'Andrea
The Collegiata di Sant'Andrea is a jewel of a museum, filled with terra-cotta sculptures from the della Robbia school, including one by Andrea della Robbia. There's also a magnificent 15th-century fresco pietà by Masolino (circa 1383–1440), as well as a small work by Fra Filippo Lippi (1406–69) and a wonderful tabernacle attributed to Francesco Botticini (circa 1446–97) and Antonio Rossellino (1427–79). On Sunday afternoon, entrance to the museum is free.