The Maiden Tower (Azerbaijani: Qız Qalası), also known locally as Giz Galasi, located in the Old City, Baku, in Azerbaijan, was built in the 12th century as part of the walled city. Together with the Shirvanshahs' Palace, dated to the 15th century, it forms an ensemble of historic monuments inscribed in 2001 under the UNESCO World Heritage List of Historical Monuments as cultural property, Category III. It is one of Azerbaijan's most distinctive national emblems, and is thus featured on Azeri currency notes and official letterheads