Gl Mosque and Hippodrome of Constantinople are both located in Istanbul, Turkey.
Gl Mosque (Turkish: "Gl Camii" , meaning: "The Mosque of the Rose" in English) is a former Eastern Orthodox church in Istanbul, Turkey, converted into a mosque by the Ottomans. 
 Today it is a square named "Sultanahmet Meydan" ("Sultan Ahmet Square") in the Turkish city of Istanbul, with a few fragments of the original structure surviving. 
