Terracotta soldiers was built by the first Emperor of China called,Qin Huang Dan in the 210BC. He built it underground before he died. Nobody had known about it except Qin Huang Dao. Qin Huang Dao had died at 247BC. His place was been attacked by the enemy in 254BC. It was all burned down except the terracotta soldiers. The terracotta soldiers was found at 1974 by a farmer digging a well.
This is Qin Huang Dao