The Forbidden City (Imperial Palace) in the heart of Beijing is the largest and most intact imperial palace and (36)________building complex in China, and the world at large. Its (37)________ began in 1406 and was completed 14 years later, having a history so far of some 580 years. 24 (38)________from the Ming and Qing (14-1911) dynasties lived and ruled China from there. Most of the buildings in the Forbidden City were (39)________many times, although they maintained the original architectural style. The Forbidden City, (40)________753 meters from east to west, and 961 meters from north to south, makes a rectangular (41)________and covers a total area of 720,000 square meters. It consists of several dozen compounds of (42)________sizes and some 9,900 bays of rooms, with a total floor area of 150,000 square meters. Most of the buildings were built with wood, (43)________ with yellow glazed tiles and built on blue-and-white stone foundations, looking solemn and brilliant. City walls were 10 meters high, and a 52-meter-wide moat (护城河) surrounds the Forbidden City. (44)________________. The building arrangement within the Forbidden City is symmetrical. The Hall of Supreme Harmony, the Hall of Central Harmony and the Hall of Preserving Harmony, (45)________________ and the Hall of Heavenly Purity, the Hall of Union and the Hall of Earthly Tranquility, comprising the inner palace, stand in a line from south to north on the central axis. (46)________________. The Forbidden City was made part of the world cultural heritage list in 1987.