Şeyh Süleyman Mosque built
1124 CE.
Shown on the map at 41.019°, 28.955°.
Şeyh Süleyman Mosque (Turkish: Şeyh Süleyman Mescidi) is a mosque in Istanbul converted from a former Byzantine building which was part of the Eastern Orthodox Pantokrator Monastery. Its usage during the Byzantine era is unclear. The small building is a minor example of architecture of the Byzantine middle period in Constantinople.
Text from the Wikipedia article Şeyh Süleyman Mosque, licensed CC BY-SA 4.0.