A CHRONOLOGICAL MISH-MASH. The City of David is the most ancient part of Jerusalem. It has been built and rebuilt countless times through the ages. This reconstruction drawing shows the close relationship of the different structures at the top of the eastern slope: the Stepped Stone Structure supported King David’s palace; Wall 20 of the palace actually joins the Stepped Stone Structure. The Northern Tower and adjoining Wall 27 (Nehemiah’s wall) were built on top of this complex by the returning exiles after it had been destroyed by the Babylonians.