The site in , an area of Üsküdar, Istanbul, a neighbourhood on the Asian part of Constantinople (now İstanbul), was originally the American College for Girls. ACG vacated the Baglarbaşı site in 1914 and moved to Arnavutköy, a neighborhood on the European side of Bosphorus, leaving the Baglarbaşı campus empty from 1914 to 1921 except for the years 1914–1915 when the buildings of the school were used as an orphanage by the Americans and the years 1915–1918 when the Turkish army used the school as a barracks.