In the late 1970s, the tombs of both kings were found in Pingshan County, Hebei, and the capital city was found shortly after, in 1976, only a mile to the east of King Cuo's tomb. Tombs The tombs of the two kings, Cheng and Cuo, were the first find of any Zhongshan architecture, and are considered the richest find of any Chinese state of the 4th century BC. They are the largest of any tombs of the Zhongshan to date. Both of their main chambers had been looted, however their storage chambers were still intact, and contained a large number of artifacts. Many of these ritual vessels found in these tombs were from surrounding warring states, with a few coming from the northern nomads, but the luxury goods were largely of the Zhongshan style. This split, between archeological evidence supporting the thesis that they were a Chinese people (Huaxia), and textual sources claiming them as a non-Chinese people, has caused two fields of thought; one side seeing the Zhongshan as a sinicized minority, an outside group that has been heavily influenced by Chinese culture, and the other seeing them as a Chinese people that were influenced by non-Chinese, nomadic peoples. Cities The capital city, Lingshou contained many ruins, including the foundations of palaces, workshops for bronze and ceramic, marketplaces, and cemeteries. The cemeteries around Lingshou contain some 125 tombs, and dozens more are scattered throughout the country. The city is believed to have been founded in 380, and to have remained the capital until 296, when Zhongshan was conquered. The city is strategically placed, surrounded on its west, north and south sides by the Taihang Mountains, with its east side facing plains. Like many other capitals of the time, the city was built at the confluence of two rivers. The city was about wide east to west, and wide north to south. Of the cities walls, only the earthen foundation remains, but it is known that they ranged between being and wide. Two gates can be seen, one on the west side and the other on the north side. Four pounded-earth terraces were attached to the walls, some near the gates. A small hill, called Huangshan, is inside the walls, in the north section of the city. The Shui Jing Zhu says that this hill is what gives the Zhongshan, meaning "central mountain", their name. The hill is believed to