Ortaköy Mosque (Turkish: Ortaköy Camii), officially the Büyük Mecidiye Camii (Grand Imperial Mosque of Sultan Abdülmecid) in Beşiktaş, Istanbul, Turkey, is situated at the waterside of the Ortaköy pier square, one of the most popular locations on the Bosphorus.

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 Nigoðayos Balyan (who also designed the nearby Dolmabahçe Palace and the Dolmabahçe Mosque), who designed it in the Neo-Baroque style.

The restoration works, which lasted approximately three years between 2011 and 2014, were completed on June 6, 2014 and the mosque was re-opened for prayers and vizitors.

Source: Wikipedia