The Prince Islands (Greek: Πριγκηπονήσια, Pringiponisia, Turkish: Prens Adaları; the word “princes” is plural, because the name means “Islands of the Princes”), officially just Adalar (English: Islands); alternatively the Prince Archipelago; are an archipelago off the coast of Istanbul, Turkey, in the Sea of Marmara. The islands constitute the Adalar district of Istanbul Province. They consist of four larger islands, Büyükada (“Big Island”) with an area of 5.46 km2 (2.11 sq mi), Heybeliada (“Saddlebag Island”) with an area of…