Which of these structures is older, Nusretiye Clock Tower or Dolmabahçe Clock Tower?
Nusretiye Clock Tower: Nusretiye Clock Tower, aka Tophane Clock Tower, is a clock tower situated in Tophane, a neighborhood in Beyoğlu district of Istanbul, Turkey next to Nusretiye Mosque and Tophane Kiosk at the European waterfront of Bosphorus. Nusretiye Clock Tower:  It was ordered by the Ottoman sultan Abdülmecid I (1823-1861), designed by architect Garabet Amira Balyan and completed in 1848. Dolmabahçe Clock Tower: Dolmabahçe Clock Tower (Turkish: "Dolmabahçe Saat Kulesi" ) is a clock tower situated outside Dolmabahçe Palace in Istanbul, Turkey. Dolmabahçe Clock Tower:  The tower was ordered by Ottoman sultan Abdülhamid II (1842–1918) and designed by the court architect Sarkis Balyan between 1890 and 1895.
Nusretiye Clock Tower