Monteriggioni is a town and commune of Tuscany, Italy. Built in the year 1213 by the overlords of Siena, Monteriggioni was actively involved in the defense of Tuscany against Florentine attempts to gain more territory. At the front of this conflict was the Auditore family, who later became the town's rulers and protectors. They constructed Monteriggioni's famous walls, and the largest structure within them, the Villa Auditore.