Nanjing Ming city wall built in the Ming Dynasty, which lasted 21 years built, do not follow the ancient capital to take a square or rectangular old system, unique design ideas, construction workmanship, majestic grand scale in Nanjing pregnant with beauty and landscape, meandering linger up to km , while the outer profile of the city wall of Nanjing city perimeter is more than 60 kilometers. Nanjing Ming City Wall is not only the country's largest city walls, and is the world's largest city walls, and was named the world's largest association of World Records walls. Nanjing Ming City Wall of China ancient military defense facilities, the city wall construction techniques epitomize work, regardless of historical value, ornamental value, archaeological and architectural design, scale, function and other aspects, the walls can not be compared to domestic and foreign, can be described as following the Chinese Great Wall of Qin after another historical wonders.