The lower section of the wall was constructed by King Herod 2000 years ago as a retaining wall to support the Temple Mount platform. Currently, sections of it are synagogue and prayer areas and the wall as a whole is considered the most holy of Jewish sites.
The Western Wall Tunnel is the extension of the Western Wall. It is the western part of a retaining wall built by King Herod to support the extended platform he constructed for the enlargement and restoration of the Second Temple.
The mosque was built in 691 by the Chalif Abed el Malek above the rock venerated by Muslims as the site from which Mohamed ascended to heaven. The Dome of the Rock is located at the center of a platform known in English as the Temple Mount and in Arabic as Al-Haram al-Sharif, (The Noble Sanctuary). It was constructed on the site of the Second Jewish Temple, which was destroyed during the Roman Siege of Jerusalem in 70 A.D.