The Castle of Castiglione del Terziere, originally known as "dei Corbellari," changed its name in 1275 to "del Terziere" because it represented a third (terziere) of the feudal possessions left by Obizzino Malaspina to his heirs. After serving as a strategic stronghold under Castruccio Castracani, Lord of Lucca, and later as an important administrative center for Florence, the castle is now privately owned.
Following a meticulous restoration, it currently houses the Center for Humanistic Studies Nicholas V and the Free Chair of Philology and Vocal Polyphony. It preserves a rich archive and library containing ancient volumes.
