Mausoleum of Qin Shi Huang: scale, terracotta army, and mercury evidence confirmed by remote sensing. The mausoleum complex took approximately 38 years to build, with construction continuing for 2 years after Qin Shi Huang's death in 210 BC; he died at age 49, possibly from mercury he consumed as an elixir of immortality. An estimated 700,000 workers built the complex, which covers approximately 56 square kilometers, making it far larger than Egypt's Valley of the Kings. The central man-made mound originally stood roughly twice its current 50-meter height before 2,000 years of weathering.

The Mausoleum of Qin Shi Huang took 38 years to build using an estimated 700,000 workers, spanning roughly 56 square kilometers. Its terracotta army features 8,000 individually modeled soldiers, 130 chariots, and 520 horses. In 2020, soil geochemical analysis detected elevated mercury concentrations above the mound, supporting historian Sima Qian's ancient account of mercury rivers inside.

Key Facts

  • The mausoleum complex took approximately 38 years to build, with construction continuing for 2 years after Qin Shi Huang's death in 210 BC; he died at age 49, possibly from mercury he consumed as an elixir of immortality.
  • An estimated 700,000 workers built the complex, which covers approximately 56 square kilometers, making it far larger than Egypt's Valley of the Kings.
  • The central man-made mound originally stood roughly twice its current 50-meter height before 2,000 years of weathering.
  • The terracotta army pit, located about 1.5 km east of the mound, contains approximately 8,000 soldiers, 130 chariots, and 520 horses, each modeled as a unique individual.
  • Additional pits contain acrobats, government officials, stables with real horse bones, and 46 bronze water birds positioned along a former underground stream, alongside clay musicians.
  • Historian Sima Qian, writing over a century after the emperor's death, described an underground palace with a pearl-studded starry ceiling, a map of China on the floor, and rivers of flowing mercury; he never mentions the terracotta army.
  • Soil testing above the mound detected mercury concentrations averaging about 205 parts per billion, with one spot reaching 1,440 parts per billion.
  • In 2020, a Chinese-Swedish team used laser radar (LIDAR) to detect mercury vapor rising from the mound through soil cracks, confirming Sima Qian's account; estimates of the total mercury inside range from tens of tons to as much as 100 tons.
  • Radar and other scanning tools have revealed the interior contains a complex structure with large chambers and corridors enclosed by thick walls of packed earth and brick, consistent with an underground palace rather than a simple shaft tomb.

Related site: Mausoleum of the Atilii — view location, images, and history on the Ancient Nerds map.

Source: Why Won't Archaeologists Open History's Biggest Tomb? by Michael Button