The sacred rock over which the Dome of the Rock is built was considered holy before the arrival of Islam. Jews believed, and still believe, the rock to be the very place where Abraham prepared to sacrifice Isaac (an event which Muslims place in Mecca). In addition, the Dome of the Rock (or the adjacent Dome of the Chain) is believed by many to stand directly over the site of the Holy of Holies of both Solomon's Temple and Herod's Temple.