The municipality of Castel San Niccolò is in the province of Arezzo and its origin is linked to the building of the stronghold of the Counts Guidi in the XIII century. It is set at 380 m. of altitude and it has a population of about 2,000 inhabitants living in numerous medieval villages.

As it has already been said, the village was born and developed in the XIII century around the castle of the Guidi, which established its presence around 1214 as the residence of powerful feudatories until the half of the XIV century. later, in 1349, the inhabitants of the centre annexed to the dominion of the Florentine Republic after they had revolted against Galeotto Guidi and had given life to a people's revolt.
Since then, the modern town was divided into the parishes of Vado (constituted of the present hamlets of Borghi di Strada, Terzelli, Prato, Rifiglio, Spalanni, La Torre and La Selva), Garliano, San Pancrazio (Borghi di Cetica Santa Maria, San Pancrazio, Pagliericcio, Pratarutoli, Trebbio, Le Lastre, Valgianni and Barbiano) and Cetica San'Angelo. All these "comunitas" that rose after the Guidi were driven away kept their administrative autonomy until the Grand Duchy reforms settled by Leopoldo of Lorraine.
The town of Castel San Niccolò, therefore, was born in 1776 and had its chief town in Strada in Casentino. Borgo alla Collina was added to the town's territories together with Montemignaio before it detached again from Castel San Niccolò and obtained its autonomous status in 1808. After the town entered the Kingdom of Italy (1859), the town of Castel San Niccolò was annexed to the province of Arezzo. In 1868, its current territorial expansion was completed with the inclusion of the villages of Caiano, Ristonchi, Battifolle and Vertelli.
Such a variety of places gave the town a rich artistic and cultural patrimony. The Parish of San Martino a Vado, a Romanesque church of the XI century which is perfectly preserved and that the famous countess Matilda di Canossa ordered to be built, is worth being cited. Instead, it is possible to admire the Cappella del Crocifisso, taking its name from a Crucifix sided by the Virgin Mary and St. John and kept on the inside, in the chief town. This work dates to 1439 and is a fresco that, according to the legend, was carried out by a prisoner using breadcrumbs.