The Ancient City of Aleppo is the historic city centre of Aleppo, Syria. Prior to the Syrian Civil War, many districts of the ancient city remained essentially unchanged since they were initially constructed between the 11th and 16th centuries. Being subjected to constant invasions and political instability, the inhabitants of the city were forced to build economically independent cell-like quarters and districts, most of which were delineated along ethnic and religious lines. These urban subdistricts, along with the ancient walled city that they surround, comprise an approximate area of 350 hectares and are home to more than 120,000 residents.