Monastery of the Pantocrator
İstanbul, TR
Monastery of the Pantocrator is a significant mosque in Istanbul, made of two former Eastern Orthodox churches and a chapel. It represents the most typical example of architecture of the Byzantine middle period in Constantinople and is, after Hagia Sophia, the second largest religious edifice built by the Byzantines still standing in Istanbul. Now it's being used as a mosque named Zeyrek Mosque.00