Which country's Terracotta Army guards Qin Shi Huang's tomb?

China, and it was found in 1974 by farmers digging a well. There are something over 8,000 figures - infantry, archers, cavalry, chariots - and every face is different, apparently assembled from moulded parts in combinations, which is mass production used to manufacture individuality.

They were painted in bright colours that survive underground and flake off within minutes of exposure to dry air, which is one reason much of the site is deliberately unexcavated. The main tomb mound itself has never been opened at all - partly out of caution, partly because Sima Qian's account a century later describes it as containing a model of the empire with rivers of mercury, and soil surveys have found mercury concentrations consistent with exactly that.

The emperor who ordered it standardised the Chinese script, weights, measures and axle widths, connected earlier walls into an early Great Wall, and buried scholars alive according to hostile later histories. He also died pursuing immortality, quite possibly poisoned by the mercury pills his alchemists prescribed for it - which is a tidy ending for a man who had a mercury river built into his own tomb.