Ortaköy Mosque, officially the Büyük Mecidiye Camii (Grand Imperial Mosque of Sultan Abdülmecid) in İstanbul, is situated at the waterside of the Ortaköy pier square, one of the most popular locations on the Bosphorus.
The original Ortaköy Mosque was built in the 18th century. The current mosque, which was erected in its place, was ordered by the Ottoman sultan Abdülmecid and built between 1854 and 1856. Its architects were Armenian father and son Garabet Amira Balyan and Nigoğayos Balyan (who also designed the nearby Dolmabahçe Palace), who designed it in Neo-Baroque style. Within the mosque hangs several examples of Islamic calligraphy executed by the Sultan Abdülmecid himself, who was also a hattat (master calligrapher).
Istanbul (historically Byzantium and later Constantinople; see the other names of Istanbul) is the largest city of Turkey and the third largest city in the world. The city covers 27 districts of the Istanbul province.It is located on the Bosphorus Strait and encompasses the natural harbor known as the Golden Horn, in the northwest of the country. It extends both on the European (Thrace) and on the Asian (Anatolia) side of the Bosphorus, and is thereby the only metropolis in the world which is situated on two continents. In its long history, Istanbul served as the capital city of the Roman Empire (330–395), the East Roman (Byzantine) Empire (395–1204 and 1261–1453), the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). The city was chosen as joint European Capital of Culture for 2010. The historic areas of Istanbul were added to the UNESCO World Heritage List in 1985.