The Castello di Milazzo (English: Milazzo Castle) is a castle and citadel in Milazzo, Sicily. It is located on the summit of a hill overlooking the town, on a site first fortified in the Neolithic era. The Greeks modified it into an acropolis, and it was later enlarged into a castrum by the Romans and Byzantines. The Arabs built a castle, which was further modified and enlarged during the Medieval and Early Modern periods. It is now in good condition, and open to the public.