The Dome of the Rock, Masjid Qubbat As-Sakhrah, Hebrew : Kipat Hasela is an Islamic shrine which houses the Foundation Stone, the holiest spot in Judaism, and is a major landmark located on the Temple Mount in Jerusalem. It was completed in 691, making it the oldest extant Islamic building in the world. Its significance stems from the religious beliefs regarding the rock at its heart. The Dome of the Rock is located at the visual center of an ancient man-made platform known as the Temple Mount, which Muslims refer to as the "Noble Sanctuary". The platform, greatly enlarged under the rule of Herod the Great, is the site of the Second Jewish Temple which was destroyed during the Roman Siege of Jerusalem in 70 CE. In 637 CE, Jerusalem was conquered by the Rashidun Caliphate army during the Islamic invasion of the Byzantine Empire. [Wikipedia].