Manastır Mosque (Turkish: 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 (Greek: Μονῆ τῶν Άγίων Μηνοδώρας, Μητροδώρας καὶ Νυμφοδώρας), or an annex of the nunnery of Kyra Martha (Greek: Μονῆ τἠς Κυράς Μάρθας). The edifice is a minor example of Byzantine architecture in Constantinople, and is important for historical reasons.