The Dome of the Rock is an Islamic monument located on the Temple Mount in the Old City of Jerusalem. It was initially completed in 691–92 CE at the order of Umayyad Caliph Abd al-Malik during the Second Fitna on the site of the Second Jewish Temple, destroyed during the Roman Siege of Jerusalem in 70 CE. The original dome collapsed in 1015 and was rebuilt in 1022–23. The Dome of the Rock is in its core one of the oldest extant works of Islamic architecture.