In Turkish called Aya Nikola rum Orthodoks Kilisesi one can find this church on Google Maps, located at Kocamustafapaşa, Muallim Fevzi Sk. No:3, Fatih. I have been informed This is the church of St. Nikolas of psomathia a greek orhtodox church built in 1834. And in a paper I found "Samatya was named Psomathia, which means sandy lands (Türker, 2010). In its ancient name,
Psomathia was one of the prestigious neighbourhoods because of its location near the Golden
Gate (Hrisi Pili) of Constantinople in the Byzantine era."