Located on the hills between Bagnone and Villafranca, the village of Castiglione del Terziere has medieval origins, known as Borgo dei Corbellari. In the thirteenth century it became Castiglione del Terziere, representing a third of the feudal estates (from which Terziere) left by Obizzino Malaspina to his heirs. In 1451, it passed under the control of the Republic of Florence, becoming the Florentine political center of reference and seat of the Captaincy of Justice.
The village is dominated by the Castle of Castiglione del Terziere, originally from the sixth-seventh century, renovated in 1351 by Franceschino Malaspina and in recent times by philanthropist Loris Jacopo Bononi. During the domination of Castruccio Castracani, lord of Lucca, the castle reached the peak of its importance, becoming a strategic stronghold for the reunification of Lunigiana, Garfagnana, Versilia and Lucchesia in a single state. Other important monuments are the original church, built in the sixteenth century, which was abandoned in 1783 and replaced by the new church of San Leonardo in 1787. In the village there is also the former convent of the Santissima Annunziata, built between 1501 and 1508, then passed to the Servite Fathers and now restored.
