The latter was connected to the Temple Mount by a bridge built on what is today known as Wilson's Arch. At the southwestern part of the upper city stood King Herod's Palace and to its north, at the present site of the Tower of David, a citadel with three towers, the Hyppicus, the Phasael and the Mariamne. It was at this citadel that the walls of Jerusalem met, one surrounding the city from the south and another approaching from the east and the Temple Mount.