A prominent landmark in Istanbul's Fener district, Phanar Greek Orthodox College is known locally as the "Red Castle" thanks to its red brick facade. It was built in the early 1880s and was designed by the Greek-Ottoman architect Konstantinos Dimadis. ) is known for its European castles, and its construction preceded the arrival of the Ottomans to Constantinople, making it the oldest educational body in Turkey, and it still operates as a Greek school to this day.