... , some farmers from Lintong county, about thirty kilometers east of Xi'an, unearthed some brown pottery fragments, which led to the ... executed terra-cotta legions as an exterior section of the mausoleum, of Qin Shi Huang or First Emperor of the Qin Dynasty (255- ... centuries. Chemical analysis revealed the sword to have been cast of an alloy of copper, tin and various other elements, including nickel, ...