The fortifications of Xi’an, also known as the Xi’an City Walls, are somre of the oldest, largest and best preserved city walls in China. Built under the rule of the Hongwu Emperor as a military defence system, the wall has been renovated several times since it was built in the 14th century, and encloses an area of about 14 square kilometres. It is situated at the end of the ancient Silk Road, and its history can be traced back to the Sui and Tang dynasties. Today, the Xi’an City Wall is on the tentative list of UNESCO’s World Heritage Site, showcasing the pride and magnificence of Xi’an, the ancient Chinese capital of 13 dynasties.