The Castello di Milazzo is located on the summit of a hill overlooking the town, on a site first fortified in the Neolithic era. The castle was built as a result of the strategic importance of the Milazzo peninsula, which commands the Gulf of Patti, the body of water that separates Sicily from the Aeolian Islands. It also commands one of Sicily's most important natural harbours.
The Greeks modified it into an acropolis, and it was later enlarged into a castrum by the Romans and Byzantines.
In around 843, the Arabs began to build a castle on the ruins of the Greek, Roman and Byzantine fortifications. The castle's keep possibly dates back to this era. The castle was enlarged by the Normans and Swabians. It was extensively modified during the reign of Frederick II of Hohenstaufen.
Between 1496 and 1508, the Aragonese built walls with six semi-circular bastions, encircling the original medieval castle. Between 1525 and 1540, the Spanish built bastioned fortifications around the Aragonese walls and the settlement which surrounded it, expanding the castle into a citadel. The new fortifications were designed by the military engineers Pietro Antonio Tomasello and Antonio Ferramolino. Some outworks were added in the 17th century. Several civil buildings began to be built within the walls of the castle, including the old cathedral and various palaces.
The castle was in Habsburg hands in the first half of the 18th century, before being taken over by the Bourbons. The latter retained the castle until they lost Milazzo to Giuseppe Garibaldi in 1860. The castle was subsequently converted into a prison in 1880, and underwent a number of alterations. The prison closed in 1959 and the castle remained abandoned for a couple of decades.
It is now in good condition, and open to the public.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.