The tower that stopped pirates

In the 17th century, the Tower of Roccapina was built in Sartène, Corse-du-Sud, on the southwest coast of Corsica. It was one of a series of coastal defences built by the Republic of Genoa between 1530 and 1620 to stem attacks by Barbary pirates. In 1994 the tower was listed as one of the official historical monuments of France. The Conservatoire du littoral, a French government agency responsible for the protection of outstanding natural areas on the coast, has purchased 503 hectares of the Punta di u Capicciolu headland and the adjacent coastline.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons