the territory of the village of Chiusdino is affected by a process of early anthropization, who became constant and increased especially from the early Middle Ages. The origin of the village, probably Longobard, abuts after the 572. In testimony to its Lombard origin, remain in Chiusdino his name in latin Cluslinum, that derives from clusa, and the title of the Church Matrix: San Michele Arcangelo, frequently in settlements the Lombards.
With the conquest of the Regnum Langobardorum accomplished by Charlemagne in 773 and the new attitude he conferred to Tuscany with the creation of Committees, more or less corresponding to the ecclesiastical circumscriptions, and accounts, the castle of Chiusdino, located on the inside of the wide Diocese of Volterra, came to be in comitatus established in that city.
Up to the XI century, the settlement of Chiusdino could be brought back to its central core, on the top of the hill, closed by walls from the perimeter rather short, on which opened a door even today preserved. In this space you can still see the remains of the masonry does not always regular, large drafts roughly squared. Within this boundary, the church of San Michele Arcangelo and at the door of the castle there is the church of San Martino.
The castle was so small as to be considered strategically irrelevant, but between the end of the XI century and the beginning of the XII century, perhaps as a result of the development of the agriculture imparted to these lands by the presence of the abbey of Serena or perhaps in relation to the cultivation of the silver mines of the nearby castles of Miranduolo and Montieri, grew so much so as to become a reason of contention between the bishop of Volterra and the della Gherardesca.
Certainly deserve a visit to the Rectory of San Michele Arcangelo, the Church of San Martino, the Abbey of San Galgano and the birthplace of the Saint.