Island, Greece. It lies 5 mi (8 km) west of Turkey, in the Aegean Sea. Of volcanic origin, it is 30 mi (48 km) long and 8–15 mi (13–24 km) wide with an area of 321 sq mi (831 sq km). It was noted in antiquity as Homer's birthplace. It was colonized by Ionians and became subject to Persia in 546 BC. Though later a member of the Delian League, it revolted several times against Athens. It prospered successively under Rome, Venice, Genoa, and the Ottoman Empire; it passed to Greece after the Balkan Wars (1912–13). The city of Chios is the principal municipality.