The Old City of Jerusalem is the heart of the Jerusalem city and Jewish history as well as the center of Judaism and a holy city to Islam and Christianity. The city is surronded by the impressive 16th century Ottoman city walls. The Old City is culturally and historically divided into four Quarters: the Muslim Quarter, the Jewish Quarter, the Armenian Quarter, and the Christian Quarter. Though under these quarters lays ancient architecture from thousands of years ago. The Old City is home to the Western Wall, also knon as the Wailing Wall. This is the last remaining wall of what was the Jewish Temple, and is today the holiest site in the world for Jews. Among Jerusalem's 220 historic monuments it is worth to mention the Dome of the Rock, recognized as the site of Abraham's sacrifice, and the Church of the Holy Sepulchre, where Jesus is said to have been crucified and buried.