Schisò Castle, Medieval castle in Giardini Naxos, Italy.

Schisò Castle is a fortress on Cape Schisò, built over the 13th–14th centuries and rebuilt in the 16th century. It stands on a spur of prehistoric lava rock above the bay of Giardini Naxos. Two cylindrical watchtowers remain, framing the inner courtyard, and balconies were added to the facade in the late 19th century.

The original structure dates to the 13th century and underwent major reconstruction in the 16th century to defend against attacks by Turkish corsair Barbarossa. These reinforcements were part of Sicily's broader response to raids across the Mediterranean.

The name Schisò comes from the Arabic Al Qusus, meaning bust or chest, itself a corruption of the ancient toponym Naxos. Inside the castle stood equipment for refining and distilling sugarcane, a lucrative crop spread by the Spanish in 16th-century Sicily; a Via Cannameli in the Chianchitta district recalls it.

The castle is fairly easy to reach from Giardini Naxos town center, with access via paths that lead along the coast. The site can be windy, so bringing appropriate clothing is helpful if you plan to spend time exploring.

The castle's name comes from the Arabic "Al Qusus", meaning bust or chest, a corruption of the name Naxos; the historian Michele Amari noted in his Biblioteca Arabo-Sicula (1880–1881) that the Arabic qusus was likely a scribal error for Nasus, Naxos. Old maps before and after the 1500s place Schisò on the same site as ancient Naxos.