The Temple of Heaven was initially built in Yongle year 18 of the Ming Dynasty (in 1420). Situated in the southern part of the city, it covers the total area of 273 hectares. With the additions and rebuild during the Ming, Qing and other Dynasties, this grand set of structures look magnificent and glorious, the dignified environment appears solemn and respectful, it is the place for both Ming and Qing Dynasty’s Emperors to worship Heaven and pray for good harvest. The northern part of the Temple is circular while the southern part is square, implies “sky is round and earth is square” to better symbolize heaven and earth. The whole compound is enclosed by two walls, dividing the whole Temple into inner and outer areas, with the main structures enclosed in the inner area. The most important constructions are the Hall of Prayer for Good Harvest, the Circular Mound Altar, Imperial Heaven, The Imperial Vault of Heaven, Heaven Kitchen, Long Corridor and so on, as well as the Echo Wall, the Triple-Sound Stone, the Seven-Star Stone and others of historic interest and scenic beauty. The Temple of Heaven is a comprehensive expression of the unique construction techniques from Ming and Qing Dynasties, it is China’s most treasured ancient architecture, it is also the world’s largest architectural complex for worship heaven. In 1998, it was included in the “list of the world heritages” by the United Nation’s Educational, Scientific and Cultural Organization.