Manastır Mosque, Istanbul

Manastır Mosque (Manastır Mescidi, also Mustafa Çavuş Mescidi, where mescit is the Turkish word for a small mosque) is a former Eastern Orthodox church converted into a mosque by the Ottomans. Neither archeological excavations nor medieval sources have made it possible to find a satisfactory answer as to its original dedication as a church. It is however possible that the small building was part of the Byzantine monastery dedicated to the Holy Martyrs Menodora, Metrodora, and Nymphodora , or an annex of the nunnery of Kyra Martha . The edifice is a minor example of Byzantine architecture in Constantinople, and is important for historical reasons.

Church data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).