The Forbidden City covers an area of about 72 hectares (180 acres) with a total floor space of approximately 150,000 square meters (1,600,000 square feet).
The Forbidden City falls into three parts: the defenses (moat and wall), the Outer Court and the Inner Court
The Meridian Gate (Wumen in Chinese) is the main gate of the Forbidden City. It had three openings. Only the emperor could go through the middle one. It was the place where the emperor issued imperial edicts and battle orders.
The Meridian Gate is the entrance for Forbidden City visits. Visitors need to pass through Tian’anmen (‘Gate of Heavenly Peace’) to reach the Meridian Gate.
The outer court has three main buildings, where emperors attended grand ceremonies. In the Ming Dynasty era, emperors would hold court in Hall of Supreme Harmony to conduct state affairs.
In the Qing Dynasty, the emperors lived and worked mostly in the Inner Court.
Out from the Hall of the Preserving Harmony, you will notice a huge block of marble carved with cloud and dragon designs. Go straight, and you will see another gate, called the Gate of Heavenly Purity (Qianqingmen). This is the main gateway to the inner living court.
The inner court has three main structures at the northern rear of the Forbidden City:
The first structure inside the inner court is the Palace of Heavenly Purity (Qianqinggong). Before Emperor Yongzheng (r. 1722–35), it was the residence of the emperor. Later it became the emperor's audience hall.
The second structure, behind it is the Palace of Union and Peace (Jiaotaidian), where the imperial seals were stored.
The third hall is the Hall of Terrestrial Tranquility (Kunninggong). In the Ming Dynasty, it was the residence of the empress. In the Qing Dynasty, it became a shamanist worship place. It was also used on the emperor's wedding night.