Monteriggioni,.... Siena, Tuscany, Italy. http://www.castlesandmanorhouses.com/photos.htm ... Monteriggioni is a medieval walled town, located on a natural hill, built by the Sienese in 1214–19 as a front line in their wars against Florence. The walls follow the natural contours of the hill. There are 14 towers on square bases, and two gates. Monteriggioni is mentioned in Dante Alighieri's Divine Comedy.