The Old City is a 0.9 square kilometre (0.35 square mile) area within the modern city of Jerusalem. Until the 1860s this area constituted the entire city of Jerusalem. The Old City is home to several sites of key religious importance: the Temple Mount and its Western Wall for Jews, the Church of the Holy Sepulchre for Christians, and the Dome of the Rock and al-Aqsa Mosque for Muslims.

Traditionally, the Old City has been divided into four quarters, although the current designations were introduced only in the 19th century. Today, the Old City is roughly divided into the Muslim Quarter, the Christian Quarter, the Jewish Quarter and the Armenian Quarter.

The Old City was added inscribed on the UNESCO World Heritage Site List in 1981. In 1982, Jordan requested that it be added to the List of World Heritage Sites in danger.