"This is the palace where the Emperor lives! No one can go in without permission."
Long ago in China, people believed that the Emperor of Heaven lived near the North Star. They thought the Emperor was a powerful warrior and the son of Heaven. That's why they called the palace where the Emperor lived the Forbidden City. It was like a sacred place for the Son of Heaven.
The Forbidden City was built by the Yongle Emperor of Ming China. It took a really long time, about 14 years, and many, many people helped build it. They brought special materials from different parts of China, like marble and wood from far away. The palace was huge, with up to 9,999 rooms and beautiful gardens. It looked like a separate city because it had tall walls and a wide moat around it. Over time, the palace had to be fixed and rebuilt.
The most important building in the Forbidden City was called the Hall of Supreme Harmony. It was where the Emperor did important things like work on important matters for the country, have weddings, meet ambassadors from other countries, and make new laws.
The Forbidden City is very special, and in 1987, it became a UNESCO World Heritage Site to show its importance to China's history.