The district of Fatih is home to this important mosque built by Sultan Mehmet the Conqueror, who finally broke through Constantinople's walls, ending the Byzantine era. 

Built atop a hill, so its multiple domes and minarets soar above the district, it's a grandly imposing building.

 As the first of Istanbul's grand imperial mosques to be built, as well as being home to Sultan Mehmet's tomb, it's an important historic building and a popular pilgrimage site for locals.