Known in the past as Taurisano, in 730 it was Warnefred’s farm (curtis), governor of Siena on behalf of the lombard king Liutprand. In December of that year Warnefred made a commitment to build, together with the rector of the monastery of S. Eugenio, a church dedicated to the most blessed martyrs Anastasio, Felice and Ilario. The church was later remembered in a papal note and on imperial diplomas of the XI-XIII centuries. The village of Bagnaia is now owned by the family Monti Riffeser and every year, in September, there is an important international horse event.