The
City Wall of Nanjing was designed by
Emperor Zhu Yuanzhang (r. 1368–1398) after he founded the
Ming Dynasty (1368–1644) and established
Nanjing as the capital 600 years ago. To consolidate his sovereignty and keep out invaders, he adopted the suggestions of advisor Zhu Sheng to build a higher
city wall, to collect grains and to postpone the coronation. Then, he started to build the city wall. It took 21 years to complete, and used 200,000 laborers to move 7 million cubic metres of earth. The City Wall of Nanjing was among the largest city walls ever constructed in China, and today it remains in good condition and has been well preserved.