Principality of Theodoro
Bryer mentions the tradition that the Greeks living on this island continued to hold out against the Ottomans in spite of the fall of the Empire of Trebizond until 1468, making this island the last Greek realm of its age (except perhaps the Principality of Theodoro). After this year, human occupation of Giresun Island appears to have ended on orders of the Ottoman Empire who prohibited foreign trade, thus reducing the commercial sea traffic that had made the island relevant to commerce and naval defense.