The Palace Museum is located in the center of the central axis of Beijing, 1 kilometer north of Tian'anmen Square, opposite Jingshan South Gate. It was formerly known as the Forbidden City. It is now built as the "Palace Museum". It is the largest existing palace-type building in the Ming and Qing Dynasties (1368-1911). It is the largest and most complete preserved wooden structure in the world. It is said that there are 99 and a half palace rooms with yellow glazed tile roof and blue and white stone base. It is called "Sea of Palaces" and is known as the first of the five palaces in the world (Beijing Palace Museum, Versailles Palace, France, Buckingham Palace, White House, Kremlin Palace, Russia). Zhu Di, the ancestor of Ming Chengzu, started construction on the basis of the Yuandu Palace in 1406 A.D. and Yongle in the Ming Dynasty was built in 1820 (1420). Twenty-four emperors lived there. Feng Yuxiang launched the "Beijing coup" in 1924 and expelled Puyi, the Qingxun Emperor, from the palace. There are four gates in the Palace Museum. The main gate is named Wumen (the place where the emperor ordered to go out), the east gate is named Donghua Gate, the west gate is named Xihua Gate, the north gate is named Shenwumen (the Ming Dynasty is "Xuanwumen" and the Qing Emperor Kangxi period is changed to "Shenwumen" because of taboos. It is now the main gate of the Palace Museum. The whole building is magnificent and magnificent. It is listed as "World Cultural Heritage" by UNESCO. In the foreign dynasty, Taihe (commonly known as the "Jin Luan Dian" was the place where the emperor held the grand ceremony), Zhonghe, Baohe (also the place where the imperial examination was held, the top three names were the champion, the eye of the table and the flower of the imperial examination), Wenhua and Wuying Dian (the leader of the peasant rebellion army Li Zicheng invaded Beijing in 1644 and held the ceremony of ascension here) were the two wings. The inner court was centered on Qianqing Palace, Jiaotai Palace and Kunning Palace, with the East as the center. The West Sixth Palace is on both wings, surrounded by a wall 10 meters high and 3,400 meters long, with a 52-meter-wide moat outside. Some palaces in the Palace Museum have set up treasure halls, clocks and watches Museum exhibitions, accounting for one sixth of the total number of Chinese cultural relics, which is the richest Museum in China.