Thirty kilometers southwest of Siena, among the hills of Tuscany, are the ruins of an ancient Cistercian Gothic abbey. In one of the nearby chapels you will find one of the most remarkable relics of the Middle Ages: the sword of St. Galgano Guidotti.
When tourists visiting Siena wonder what can be seen in the city, apart from the beautiful hills and villas, one answer is "visit the village of Chiusdino" for the magnificent medieval architecture, its outdoor opera festivals and to see the real sword in the stone.
Source: http://aleteia.org/