The inner wall, 2.4 meters thick ... the History of Administrative Statues of the Tang Dynasty says, "in 798, 378 houses were completed around each of Xianling, Zhaoling, Qianling, Dingling ...

All the built-in square octagonal pillars, brackets, beam ends and the north wall ... Tang had declined by the time Li Jing died, and he had declared himself a vassal of the Later Zhou Dynasty ...

The Tang Dynasty (618–907 CE ... and Taizong once remarked that Li Shiji was more effective than the Great Wall in protecting ...