Taihedian (Hall of Supreme Harmony)Ⅲ
Chongyanwudianding is an exclusive roof structure that we can see only in Taihedian (Hall of Supreme Harmony) and Lingendian of Ming Thirteen Tombs. It is only used in imperial architectures. At both ends, two big decorations are set with 3.4 meters long and weight of 4300 kilograms. The eave corner has 10 animal sculptures. It is the only architecture has so many animal sculptures. Taihedian (Hall of Supreme Harmony) in total has 72 columns to hold the total weight of the architecture. Among the columns, the mid one is the thickest and tallest with a diameter of 1.06 meters and 12.7 meters in height. In Ming dynasty, the columns were made of Nanmu, a kind of rare wood generally from Sichuan, Guangxi, Yunan and Guizhou provinces. Pine-tree wood was used as the column after the restoration of Qing dynasty, and these woods were all from the deep mountains of northeast China.