a very tall building with a clock on it's side

The Galata Tower (Turkish: Galata Kulesi), called Christea Turris (the "Tower of Christ" in Latin) by the Genoese, is a medieval stone tower in the Galata/Karaköy quarter of Istanbul, Turkey, just to the north of the Golden Horn's junction with the Bosphorus. It is a high, cone-capped cylinder that dominates the skyline and offers a panoramic vista of Istanbul's historic peninsula and its environs.