The Museo d'Arte Sacra della Val d'Arbia is a small museum of religious art in Buonconvento, in the Val d'Arbia to the south of Siena, in Tuscany in central Italy. It contain a number of paintings by important artists of the Sienese School, among them Duccio di Buoninsegna, Sano di Pietro and Pietro Lorenzetti. The museum is housed in the Palazzo Ricci Socini, close to the parish church of Santi Pietro e Paolo.