Corsica is a French island in the Mediterranean Sea. It is located west of Italy, southeast of the French mainland, and north of the Italian island of Sardinia. Mountains comprise two-thirds of the island, forming a single chain. Before French domination, Corsica was under the ownership of the Republic of Genoa.
Corsica is one of the 27 régions of France, although it is designated as a territorial collectivity by law. As a territorial collectivity, it enjoys some greater powers than other French régions. Corsica is referred to as a "région" in common speech, and is almost always listed among the other régions of France. Corsica is split into two departments, Haute-Corse and Corse-du-Sud, with its regional capital in Ajaccio, the prefecture of Corse-du-Sud. Bastia, the prefecture of Haute-Corse, is the second-largest settlement in Corsica.