 Seggiano was ruled from Siena starting in the second half of the 13th century, during which exerted strong influences of the Salimbeni family until the 14th and the 15th century onwards Ugurgeri.In 1555, the town became part of the Grand Duchy of Tuscany.The medieval origins can be traced in the walls built, in large part, the exterior walls of some buildings, access to the village is possible through three doors