Church of St Mary of the Mongols

History buffs will find a visit here more satisfying than those specifically interested in architecture, as this squat red-brick church is quite unprepossessing from the outside and an unfortunate exercise in ecclesiastical decorative overkill inside. Historically, though, it is extremely significant, being the only Byzantine church in İstanbul which has not, at some stage or another, been converted into a mosque. It was consecrated in the 13th century and saved from conversion by the personal decree of Mehmet the Conqueror. If you ring the bell on the outside gate you may attract the attention of the caretaker, who is usually happy to show visitors the church in exchange for a tip.