The Forbidden City in China was recognized as a Word Heritage Site in 1987 by UNESCO. The Forbidden City is the biggest ancient palace in the world. It is located in the center of The Beijing. It also was the center of Chinese politics and government for about 500 years. Zhu Di, the third emperor of Ming dynasty, began to build it in 1406 and completed 1420. There is a contribution of more than 200 workers to build. The Forbidden City is a rectangle, length is about 3200 feet, and width is about 2500 feet. The walls are approximately 28 feet wide at the base. So, we can see a steady defense that it is not easy to attack. There are four gates to access. It has more than 9900 rooms, 17 palaces, and 5 halls. The material of palaces is the
