Ortaköy (literally Middle Village in Turkish) in Greek known as Agios Fokas (Άγιος Φωκάς) in the Byzantine period and Mesachorion (Μεσαχώριον, meaning "middle village") later, is a neighbourhood, formerly a small village, within the Beşiktaş district of Istanbul, Turkey, located in the middle of the European bank of the Bosphorus.