Hirami Ahmed Pasha Mosque built
1101 CE.
Shown on the map at 41.028°, 28.946°.
Hirami Ahmet Pasha Mosque (Turkish: Hırami Ahmet Paşa Mescidi) is a former Eastern Orthodox church converted into a mosque by the Ottomans. The small church, one among the 36 dedicated to Saint John the Baptist in Constantinople, was part of a monastery bearing the same name. Its full name was Saint John the Forerunner by-the-Dome (Greek: Ἃγιος Ἰωάννης ὁ Πρόδρομος ἐν τῷ Τρούλλῳ, Hagios Ioannis ho Prodromos en tō Trullō). It is the smallest Byzantine church of Constantinople still extant and has never been studied.
Text from the Wikipedia article Hirami Ahmet Pasha Mosque, licensed CC BY-SA 4.0.