The Hall of Prayer for Good Harvest (Qi Nian Dian) at Tian Tan.



The hall is a cone-shaped structure with triple eaves. Originally, the triple eaves were painted in different colors. The top was blue, which symbolized Heaven, the middle was yellow to symbolize the emperor and the bottom was green to represent commoners. During the Emperor Qianlong's reign (1736-1795), all the eaves were painted blue to follow the color of the sky.