The Great Wall of China
The Great Wall of China is a wall that covers much of the northern border of China. The Great Wall of China was built over 2000 years ago and is the longest man-made structure ever built. It was named one of the New Seven Wonders of the World.
The wall was built to help keep out northern invaders like the Mongols. The original Great Wall was started by the Qin Dynasty. Later the Ming Dynasty rebuilt the wall. Much of the Great Wall that we know today was built by the Ming Dynasty.
The wall was built by peasants, slaves, criminals, and other people who the emperor decided to punish. Soldiers were involved in building the wall and in managing the workers as well. They were guarding the walls and towers.
Generally, the wall was built with whatever resources were available nearby.