The Genoese Citadel is the main part of the town of Calvi, and its most important historical monument. It was a military outpost in the 15th century that helped guard the city against attacks from Franco-Turkish raiders to Anglo-Corsican armies. Inside the battlements, don’t miss the well-proportioned Caserne Sampiero, a military barracks that once served as the Genoese administration's seat of power, and the 13th-century Cathédrale St-Jean Baptiste, whose most celebrated relic is the ebony Christ des Miracles, credited with saving Calvi from Saracen invasion in 1553.
The citadel sits high above Calvi port from where it towers over the sea. From up here you get some great views of the coast and harbour.
The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.