Old City or Inner City is the historical core of Baku, the capital of Azerbaijan. The Old City is the most ancient part of Baku, which is surrounded by walls were well protected. In 2007, the Old City had a population of about 3000 people. In December 2000, the Old City of Baku, including the Palace of the Shirvanshahs and Maiden Tower, became the first location in Azerbaijan to be classified as a World Heritage Site by UNESCO.