Worshipers prayed to Zhenwudadi, the god of water, inside of the Hall of Imperial Peace for protection against fire. When you see this structure (Qin’andian) on its Xumi marble base, you have entered the northernmost point of Forbidden City known as Imperial Garden. Within the three acres of Yuhuayuan is a colored mosaic walkway flowing among ancient trees, flowering plants, sculpted bushes, arranged rocks, statues, terraces and 20 pavilions. This was the private sanctuary for the emperor and his family.