Terracotta Army: What the Site Really Is | Xi'an Guide

THE TERRACOTTA ARMY — WHAT THE SITE ACTUALLY IS

The site occupies 56.25 square kilometers on the northern slope of Mount Li approximately 1.5 kilometers east of the tomb mound of Emperor Qin Shi Huang, who ruled from 246 BCE until his death in 210 BCE. The mausoleum complex was built over 38 years beginning around 246 BCE and involved an estimated labor force of 700,000 workers according to records by historian Sima Qian writing approximately a century after completion. The terracotta figures were discovered in March 1974 by local farmers Yang Zhifa, Yang Peiyan, and Yang Xinman digging a well during a drought in Xiyang Village. The accidental discovery led to systematic excavations that continue today across multiple pit sites separated by rammed earth walls.

Pit One measures 230 meters east to west and 62 meters north to south covering 14,260 square meters. It contains an estimated 6,000 terracotta figures arranged in battle formation including infantry, charioteers, and commanders, though only approximately 2,000 have been excavated and reassembled as of 2024. The floor sits five meters below current ground level and consists of compacted earth surfaced with over 6,000 ceramic tiles each measuring 48 centimeters square. Eleven parallel corridors run east to west separated by rammed earth partition walls 2.4 meters thick and originally supporting timber roof beams spaced every 3 meters. The roof structure consisted of pine logs layered with reed mats and sealed with clay before being covered with earth. Archaeological evidence shows this roof collapsed shortly after burial due to structural failure rather than later disturbance, crushing many figures and creating the fragmented condition in which they were found.

Pit Two covers 6,000 square meters in an L-shaped configuration discovered in 1976 during systematic surveying north of Pit One. It contains approximately 1,300 warriors and horses plus 89 war chariots organized into four distinct military units: kneeling archers in the eastern section, standing archers and infantry in the southern section, a chariot formation in the central section, and cavalry with saddled horses in the northern section. This pit represents a combined arms formation integrating multiple tactical units. Excavation here has proceeded more slowly using refined techniques developed after lessons from Pit One, with controlled humidity and immediate application of preservative agents to prevent the rapid deterioration of paint pigments that occurred when earlier figures were exposed to air.

Pit Three measures only 520 square meters and contains 68 warriors plus one war chariot with four horses arranged in a guard formation facing outward. The spatial arrangement and presence of elaborate chariot fittings including bronze weapons and jade ornaments led archaeologists to interpret this as a command headquarters rather than a combat unit. The pit layout includes a corridor entrance on the north side leading to a central chamber with guard units positioned in alcoves along the walls. This configuration mirrors descriptions of military command posts documented in contemporary Qin military texts.

Each figure was manufactured using local loess clay extracted from deposits within five kilometers of the site, as confirmed by mineralogical analysis matching clay composition to nearby geological formations. The manufacturing process involved constructing solid legs and a hollow torso built up in coils, with separately molded arms, hands, and heads attached before firing. Feet were formed as integrated bases providing structural support, with average figure weight ranging from 160 to 200 kilograms depending on rank and posture. Heads were created using eight basic face molds which were then individualized by hand-adding clay features including eyes, noses, ears, mustaches, and beards before firing, producing sufficient variation that no two faces are identical among excavated examples.

Firing took place in kilns reaching temperatures between 1000 and 1050 degrees Celsius based on thermoluminescence analysis of ceramic samples. After firing, surfaces were coated with lacquer as a base layer before applying mineral pigments including cinnabar for red, malachite for green, azurite for blue, charcoal for black, iron oxide for brown, and white lead for white. Chinese purple, a synthetic barium copper silicate pigment first synthesized during the Qin Dynasty, appears on armor plates and decorative elements. When first excavated, many figures retained substantial painted surfaces, but exposure to dry air caused the lacquer layer to dehydrate and curl within minutes, taking pigment with it. Modern excavation protocols now include immediate application of polyethylene glycol solutions and controlled atmospheric chambers to slow deterioration.

Height varies by military rank and function. Infantry soldiers average 178 centimeters tall while generals stand approximately 196 centimeters, reflecting both actual physical selection criteria for military officers and symbolic hierarchical representation. Cavalry figures measure slightly shorter at 175 centimeters to accommodate the mounted position. Horses stand 172 centimeters tall at the withers and measure 203 centimeters from head to tail, representing stocky Mongolian horse breeds used by Qin military forces. Each horse weighs approximately 200 kilograms. Archaeological analysis of horse anatomy shows accurate reproduction of musculature, skeletal structure, and proportions based on careful observation of living animals.

Armor varies across ranks and units with 16 distinct armor types documented among excavated figures. Infantry wear knee-length battle robes overlaid with armor plates laced together with leather thongs. Archers wear lighter short robes ending above the knee to permit greater mobility. Generals wear long robes with elaborate fish-scale armor covering the chest and double-layered protective plates on shoulders. Cavalry wear shorter robes with separate leg protection. The number of armor plates ranges from approximately 160 on basic infantry to over 600 on general officers. Individual plates average three centimeters wide by five centimeters tall. Careful examination reveals that armor lacing patterns follow documented Qin military specifications, with each knot and tie positioned according to regulations designed to maximize protection while maintaining flexibility.

Weapons were real bronze implements placed in the hands of terracotta warriors rather than ceramic replicas. Over 40,000 bronze weapons have been recovered including swords, spears, lances, halberds, axes, crossbows, and arrows. Bronze composition averages 75 percent copper, 23 percent tin, and 2 percent lead, producing a hard alloy capable of holding a sharp edge. Qin swords measure 81 to 94 centimeters in length with blades 3.5 centimeters wide tapering to sharp points. Metallurgical analysis reveals that sword surfaces were treated with chromium compounds creating a protective coating that prevented corrosion for over 2,000 years. When excavated, many swords remained sharp enough to cut paper. Crossbow triggers show sophisticated bronze casting techniques with interchangeable parts manufactured to tolerances within 0.2 millimeters, representing an early form of standardized production.

The tomb mound of Emperor Qin Shi Huang sits 1.5 kilometers west of the terracotta pits and rises 51 meters above the surrounding plain, though originally stood approximately 115 meters high before centuries of erosion reduced its height. The mound covers an area of 345 meters north to south by 350 meters east to west. Ground-penetrating radar and magnetic surveys indicate a large underground palace chamber beneath the mound surrounded by multiple walls and gates. Historical accounts by Sima Qian describe the burial chamber as containing rivers of mercury representing the Yangtze and Yellow Rivers, mechanically operated crossbows set to fire at intruders, and a ceiling decorated with astronomical charts, though these descriptions await verification through excavation. Soil samples extracted from the mound area show mercury concentrations 100 times higher than surrounding soil, providing some support for historical descriptions.

The entire mausoleum complex extends far beyond the terracotta warrior pits and the central tomb mound. Archaeological surveys have identified an inner city wall enclosing 2.13 square kilometers and an outer city wall enclosing 6.3 square kilometers, both constructed of rammed earth originally standing several meters high. Within these walls, over 600 accompanying burial pits have been located through remote sensing and limited excavation. Pit K9801 located near the tomb mound contained 17 terracotta figures wearing official court robes rather than military armor, interpreted as civil administrators. Other pits have yielded bronze chariots, terracotta musicians, acrobats, and waterfowl, suggesting the complex recreated the emperor's entire court rather than solely his army.

Two bronze chariots discovered in 1980 in a pit 20 meters west of the tomb mound represent the most technically sophisticated artifacts recovered from the site. Each chariot is approximately one-half life size with the first measuring 225 centimeters long and the second 317 centimeters long. The chariots contain over 3,000 individual bronze components including wheels, axles, canopies, and ornamental fittings connected using tongue-and-groove joints, hinges, and pin fasteners. The second chariot includes a completely enclosed passenger compartment with windows, doors that open and close, and an adjustable ventilation system. Bronze components were cast with wall thickness ranging from 1 to 4 millimeters using lost-wax techniques requiring precise control of molten metal flow. The chariots were drawn by four bronze horses each wearing gold and silver ornamental tack, with total gold weight exceeding 3,000 grams per chariot.

Excavation strategy has evolved substantially since initial work in the 1970s. Pit One underwent rapid excavation from 1978 to 1984 to create a public exhibition hall, resulting in exposure of figures to uncontrolled atmospheric conditions and loss of painted surfaces on hundreds of warriors. Pit Two excavation began in 1994 using protective enclosures maintaining humidity at 80 to 85 percent and applying preservative chemicals within seconds of exposure. Excavation now proceeds at approximately 50 square meters per year in Pit Two compared to over 1,000 square meters per year during early Pit One excavations. Current protocols require immediate documentation using photogrammetry before any movement of artifacts, chemical analysis of soil matrices surrounding each figure, and laboratory conservation before public display.

The Museum of Qin Terracotta Warriors and Horses opened in 1979 and has expanded to three large exhibition halls directly over Pits One, Two, and Three plus separate galleries for bronze chariots and special exhibitions. The complex receives approximately 8 million visitors annually making it among the most visited archaeological sites globally. The exhibition hall over Pit One encloses the entire 14,260 square meter pit under a vault roof supported by steel columns positioned to avoid disturbing unexcavated areas. Visitors view from raised walkways on the north and east sides looking down on rows of warriors standing in original excavation trenches. Climate control systems maintain stable temperature and humidity though mass tourism creates ongoing conservation challenges.

UNESCO designated the Mausoleum of the First Qin Emperor including the terracotta warrior pits as a World Heritage Site in 1987 under criteria iii and iv, recognizing it as a unique testimony to a cultural tradition and an outstanding example of architectural ensemble. The UNESCO inscription covers 56.25 square kilometers including the tomb mound, warrior pits, and associated archaeological features within the outer city wall. Chinese national protection designation as a Major Historical and Cultural Site Protected at the National Level was granted in 1961 before the terracotta warriors were discovered, based on the historical significance of the tomb mound.

Approximately 75 percent of the warrior pits remain unexcavated as of 2024 due to a deliberate preservation strategy prioritizing in-ground conservation until analytical and preservation technologies advance sufficiently to prevent the deterioration observed in earlier excavations. The tomb mound itself has never been excavated and no official plans exist for opening it, driven by both technological limitations in preserving potential contents and cultural sensitivity regarding disturbance of an imperial burial. Ground-penetrating radar surveys conducted between 2010 and 2016 mapped anomalies consistent with walls and chambers beneath the mound but provide limited detail about specific contents. The State Administration of Cultural Heritage has repeatedly stated that excavation of the central tomb will not proceed until preservation methods exist that can guarantee long-term stability of any artifacts discovered, a threshold not yet met by current conservation science.