The Terra-cotta army, 7500 life-size clay soldiers, was built to surround and protect the tomb of Qin Shihuangdi, emperor of the Qin Dynasty. It took 700,000 slaves over 40 years to complete the tomb. The tomb was built in Xian, China and partially buried underneath Mount Li. In 1974, Yang Jungeng and fellow farmers were digging a well during period of drought and accidentally discovered the terra-cotta head of a soldier. This began many years of excavation and discovery. It was discovered that each soldier of Qin's army had a different face and was painted using 13 colors. The actual tomb of Qin Shihuangdi has not yet been opened. There was an ancient Chinese history book, the Shiji, written by Sima Qian that warned of danger to anyone who tried to open the tomb. Also, Chinese archaeologists are trying to ensure that the fragile documents, paper and silk that might be in the tomb will be protected from decay when the tomb is finally opened. What is inside the tomb? The Shiji wrote that there were models of palaces, a roof of copper and precious stones, silver and gold birds on a mercury stream. Of course, they may even find Qin Shihuangdi himself. This will definitely be one of the most exciting sites in recent archaeological history. Check out the "Mysteries" page for a chance to vote for what you think is in the tomb.