It is one of the several Benedictine monasteries founded in the XI century by the counts' families, in this case by the Ardengheschi. The cenoby went under the protection of the marquis of Tuscany Corrado and during the XII century got the control on many churches of the zone, among whom also the Civitella castle's one.

Afterwards there was a time of decadence which ended with its annexation to the Agostiniani order from Siena in 1446. Nowadays you may see only a part of the Romanesque church, originally a three naves one, in the interesting façade with projecting portal. The façade is framed by two carved capitals columns: the right one representing two felines with a single head, a decoration similar to a sculpture in the façade of Sant'Antimo monastery.