Stock image showing a section of the Great Wall of China at sunset. Archaeologists have discovered dozens of ancient “stone grenades” along one section of the Wall near Beijing.

Learn how archeological investigation reveals the Great Wall of China had three distinct building styles over time.

The Manchu, or Qing, dynasty (1644-1912), hugely expanded China’s borders northward, making the Great Wall largely unnecessary as a defensive measure.The wall stands as the world’s largest ...