 Tianlongshan Grottoes in Taiyuan was constructed over a number of centuries, as early as the Northern Qi dynasty.The oldest preserved wooden structures in China are found in Shanxi.The four preserved Tang architectures are Foguang Temple and Nanchan Temple in Mount Wutai, Five Dragons Temple in Ruicheng County, in Changzhi (Some scholars argue that was first constructed in Later Tang of the Five Dynasties, instead of Tang Dynasty).