Castelnuovo Berardenga is a comune (municipality) in the Field of Siena in the Romance realm Tuscany, situated some 50 km southeast of Town and near 14 km eastside of Siena. Since 1932 it is included in the Chianti wine-production expanse.  The famous Action of Montaperti between Guelphs and Ghibellines was fought nearby on Sep 4, 1260. The territory of Castelnuovo Berardenga borders the masses municipalities: Asciano, Bucine, Castellina in Chianti, Gaiole in Chianti, Monteriggioni, Radda in Chianti, Rapolano Terme, Siena. Main sights: - The remains of the castle, built by the Sienese in 1366. - The Prepositura church, with a Madonna with Child (1426) by Giovanni di Paolo. - Villa Arceno. - Villa di Catignano. - Villa di Geggiano, in the frazione of Pianella.