Castello di Bivona, Medieval castle in Bivona, Italy.

Castello di Bivona is a fortified structure in Bivona featuring four cylindrical corner towers and substantial stone walls that once displayed defensive battlements. The construction showcases typical medieval military architecture designed to protect the settlement from sea-based and land-based threats.

The first certain record is a diploma of 11 October 1299, when Robert of Anjou, King of Naples, granted the castles of Bivona and Calatamauro to Giacomo de Catania; the structure then was probably a watchtower built during the War of the Sicilian Vespers. The castle itself rose in the first half of the 14th century. In 1359 Guido and Francesco Ventimiglia tried to destroy it, and Corrado Doria rebuilt it within the same year. It passed to Nicholas Peralta in 1397 and to Francesco Castellar in 1406, and was sacked and partly destroyed in 1529 during the Secondo caso di Sciacca.

The castle gave Bivona the status of terra, a fortified settlement, rather than a simple casale. Its name appears in Latin as Castrum Bisbonae. A description of the building was published in the Atti della Città di Palermo of 1892 by Fedele Pollaci Nuccio and Domenico Gnoffo.

The ruins lie inside Bivona's built-up area, in the Sicani mountains about 100 km from Palermo, not on the coast. Parts of the castle are embedded in later buildings, so the remains are seen from the surrounding streets. The site is protected under law 364/1909.

The castle was one of the few in the Val di Mazara built inside the inhabited centre, like those of Alcamo, Ciminna and Racalmuto. Its perimeter, taken from old municipal maps, measured 47.5 m on the north side, 35 m east, 27 m south and 44.5 m west, about 1,700 m² in all.