The first emporer's army, Qin Shi Huang. Buried in 209 BCE he had a terracotta army created to protect himself in the afterlife.
The army contains 8,000 soldiers, 130 chariots with 520 horses, and 150 cavalry horses.
The main tomb where Qin Shi Huang is laid to rest is yet to be entered.
Reasons stated for not entering the main tomb range from booby traps, superstition, and fears of destroying any delicate archeological artifacts.