 The period also featured true cast @-@ iron pagodas , such as the Iron Pagoda of <unk> Temple ( Jade Springs Temple ) , <unk> , Hubei Province . Built in <unk> , it incorporates 53 @,@ <unk> kg ( 118 @,@ 715 lb ) of cast iron and stands 21 @.@ 28 m ( 69 @.@ 8 ft ) tall . <unk> contemporary wooden , stone , and brick pagodas , the pagoda features sloping eaves and an octagonal base . Another iron pagoda was constructed in 1105 , <unk> , Shandong , and was cast layer by layer in octagonal sections , standing 78 feet high . Several such cast iron pagodas exist in China today . 
