The biggest and most complete ancient building complex is the former Imperial Palace (also known as the Forbidden City) in Beijing. It was imperial palace of both the Ming and Qing dynasties. It was first completed in 1420 and covers an area of 720,000 square meters.
The Forbidden City, now called the Palace Museum, is located in the center of Beijing. Starting in 1420, the Forbidden City was the home to 24 Chinese emperors during the Ming and Qing dynasties (1368-1911). Now, it has developed into the Palace Museum, which displays art treasures of the past dynasties and is the richest treasury of cultures and arts in China. Lofty and magnificent, the Forbidden City is acclaimed as one of the world five great palaces, ranking with Palace of Versailles in France, Buckingham Palace in Britain, White House in the United States and Kremlin in Russia, and was listed by UNESCO as a World Cultural Heritage Site in 1987.
Extending 750 meters east-west and 960 meters north-south, The Forbidden City covers 720,000 square meters, and is the largest palatial complex in the world and the most complete ancient architectural group extant in China. It has 9,999 buildings, and is called the Ocean of Palaces. No matter in terms of plain layout, three-dimensional effect or magnificent appearance, the complex is really an unparalleled masterpiece in the world. A central axis runs through the whole palace and the axis happens to be on the central axis of Beijing City. The Forbidden City is divided into southern and northern parts by the axis: The former served as the emperor's work area and the latter as his living quarters. The main structures are arranged along the central axis, and the buildings on both sides of it are symmetrical.