Corsica Corsica Corsica (; ; "Corsica" in Corsican and Italian, pronounced and respectively) is an island in the Mediterranean Sea and one of the 18 regions of France. It is located southeast of the French mainland and west of the Italian Peninsula, with the nearest land mass being the Italian island of Sardinia to the immediate south. A single chain of mountains makes up two-thirds of the island. While being part of Metropolitan France, Corsica is also designated as a territorial collectivity ("collectivité territoriale") by law. As a territorial collectivity, Corsica enjoys a greater degree of autonomy than other French regions;
Roman Catholic Diocese of Mariana in Corsica see of Accia was separately revived in 1968. Roman Catholic Diocese of Mariana in Corsica The Diocese of Mariana in Corsica () was a Roman Catholic ecclesiastical territory in Mariana, Corsica, in the north-eastern corner of the island. In 1563 the diocese was united with the Diocese of Acci(a) to form the Diocese of Accia and Mariana. Both dioceses were poor and had lost population. Mariana had been abandoned and its bishop lived in Bastia to the north, the seat of the civil government of the island. The Cathedral sat alone near the banks of the River Golo some three