A monastery of Tuscany, Italy, 6 m. S. of Asciano. It was founded in 1320, and is mainly celebrated for the beautiful frescoes in the monastery court, which are by Luca Signorelli (1497-1498) and Antonio Bazzi, called Sodoma (1505), representing scenes from the legend of St Benedict. The church and library contain fine inlaid woodwork by Fra Giovanni da Verona.