The most notable mosque on Büyükada is Hamidiye Camii, which is four hundred meters south of the iskele on Ada Camii Sokağı. The mosque was built in 1892-3, and is named for Sultan Abdül Hamit II (r. 1876-1909). The main entrance, approached by a double stairway, is on the second floor of a three-storeyed structure that gives access to the prayer room, which is square in plan and covered by a dome.
