Useful cultural background: The Song Dynasty in China (Columbia University) LINK
Wikipedia article: Pagoda LINK
Wikipedia article: Architecture of the Song Dynasty: LINK
Wikipedia article: Pagoda of Fogong Temple LINK
Wikipedia article: Ancient Chinese Wooden Architecture LINK"The Eight-Sided Pagoda of Foguang Si at Yingxian" by Kate Erickson LINK
Wikimedia page: Pagodas in China LINK