In which country is this medieval walled town built by the Sienese in 1214–19?

Monteriggioni is a comune in the province of Siena in the Italian region of Tuscany. The town is architecturally and culturally significant; it hosts several piazzas, and is referenced in Dante Alighieri's "Divine Comedy". Monteriggioni is a medieval walled town, located on a natural hillock, built by the Sienese in 1214–19 as a front line in their wars against Florence, by assuming command of the Via Cassia running through the Val d'Elsa and Val Staggia to the west.

The roughly circular walls, totalling a length of about 570 metres (1,870 ft) and following the natural contours of the hill. There are 14 towers on square bases set at equidistance, and two portals or gates. One gate, the Porta Fiorentina opens toward Florence to the north, and the other, the Porta Romana, faces Rome to the south. The main street within the walls connects the two gates in a roughly straight line.