Chios (Greek: Χίος, pronounce IPA: [ˈçio̞s]; alternative transliterations Khíos and Híos) is the fifth largest of the Greek islands, situated in the Aegean Sea seven kilometres (five miles) off the Turkish coast. The island is noted for its strong merchant shipping community, its unique mastic gum and its medieval villages. The eleventh century monastery of “Nea Moni”, a UNESCO World Heritage Site, is located on the island.