Lakes of mercury and human sacrifices – after 1,800 years, Teotihuacan reveals its treasures

Lakes of mercury and human sacrifices – after 1,800 years, Teotihuacan reveals its treasures

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Lakes of mercury and human sacrifices – after 1,800 years, Teotihuacan reveals its treasures

In the ruins of Teotihuacan, Mexico’s ancient city, a tunnel was found beneath the Feathered Serpent pyramid in 2003. The sealed-off passage was discovered to contain thousands of exceptional treasures lying exactly where they had been placed as ritual offerings to the gods after being undisturbed for 1,800 years.

Greenstone crocodile teeth, crystals shaped into eyes, and statues of jaguars ready to pounce were among the finds. A miniature mountainous landscape, 17 metres underground, with small pools of liquid mercury representing lakes, was even more remarkable.

A skull statue that will be on display in Teotihuacan: City of Water, City of Fire, at the De Young Museum in San Francisco.

The tunnel’s walls had been impregnated with powdered pyrite, or fool’s gold, to create the illusion of standing under a galaxy of stars when lfirelight.

The archaeological site, near Mexico City, is one of the largest and most important in the world, with millions of visitors every year. This was its most exciting development for decades – and the significance of these new discoveries is explored in a major exhibition opening this month at the de Young Museum in San Francisco.

Teotihuacan has long been a place of mysteries. It was the most populous city in the Americas nearly 2,000 years ago, but little is known about its language, rulers or the circumstances of its collapse, in around AD550. Its name, which means “birthplace of the gods”, was given much later by the Aztecs, who treated the ruins – including the monumental Pyramids of the Sun and Moon and the majestic Avenue of the Dead – with due reverence.

Many questions remain unanswered, but the newly discovered tunnel has led to a greater understanding of the design and mythology of Teotihuacan, which was a sacred place as well as a bustling metropolis. The de Young exhibition, as well as showcasing artworks from numerous collections, offers the latest theories about the mysteries that still surround it.

Left for 1,800 years … the two standing statues discovered in the tunnel.

The tunnel was chanced upon by Mexican archaeologist Sergio Gómez Chávez, who, after days of heavy rain, noticed that a sinkhole – a danger to tourists – had opened up near the foot of the Feathered Serpent pyramid. He shone a torch in but could see only darkness, so tied a rope round his waist and was lowered by workers down the hole, which with surprise he realised was a perfectly cylindrical shaft.

There was, he recalls, a sharp stench that was nearly unbearable, but at the bottom he peered through a gap in the rubble to see an underground passage, evidently an ancient construction. Work proceeded cautiously: before a dig began, his team used a robot with a video camera to explore the tunnel, which turned out to be as long as a football field, passing below the nearby great plaza as well as the pyramid. “We were amazed by what no one had seen for at least 1,500 years,” says Gómez Chávez in the show’s catalogue. At one end, the passage opened out into three chambers containing riches worthy of a quest by Indiana Jones.

What lies beneath … the Pyramid of the Moon at Teotihuacan.

The vast Pyramids of the Sun and Moon are different from those of ancient Egypt, being temples rather than tombs. They are connected by the Street of the Dead as part of an urban grid, the whole pattern oriented to the movement of the sun. The city’s very design contains the idea of it being “the birthplace of the gods” – where the universe was thought to have begun. Watermarks along the walls of Gómez Chávez’s passage have proved that the huge plaza above it was deliberately flooded to create a kind of primordial sea, with pyramids as metaphorical mountains emerging from the water as at the beginning of time. Thousands of people would have witnessed ceremonies re-enacting the creation myth.

Armed avian … a fragment from a bird mural

The inhabitants of the city, along with those from similar civilisations, believed the universe had three levels, connected by an axis: the celestial plane, the earthly plane and the underworld, which wasn’t the Biblical place of fiery punishment but a dark, watery realm of creation, with lakes and mountains – it signified riches and rebirth as well as death. The rich array of objects Gómez Chávez has brought up from the passage – large spiral shells, beetle wings arranged in a box, hundreds of metal spheres – was left there as treasure to appease the gods. But it also seems that the tunnel, with its pyrite galaxy and liquid mercury lakes, was itself a re-creation of the underworld.

Most remarkably, at the end of the passage Gómez Chávez’s team uncovered four greenstone statues, which are a highlight of the de Young show. They are wearing garments and beads, and their open eyes would have shone with minerals. Two were still in their original positions, leaning back and apparently gazing up at the axis where the three planes of the universe meet: these are the founding shamans of Teotihuacan, who guided pilgrims to the sacred place. They carried bundles of sacred objects used to perform magic, including pendants and pyrite mirrors, which were seen as portals to another realm.

Worthy of a quest by Indiana Jones … Feathered Serpent head.

Other major Teotihuacan discoveries from the past few decades are represented in the show. A court is now thought to have existed near the plaza, where residents would have played the Mesoamerican equivalent of racquetball. In the 1980s, evidence of human sacrifice was found inside the Feathered Serpent pyramid. More than 100 warriors, kneeling with their hands bound behind their backs, are believed to have died there. Many wore necklaces of shells carved to look like human teeth; a few were made of actual teeth. In another pyramid, copious remains of animal sacrifices have been discovered, including wolves, rattlesnakes, golden eagles and pumas.

Explorer … a camera robot travels along the vast tunnel under the Pyramid of the Feathered Snake.

The facade of the Feathered Serpent was designed to be fearsome, with imposing stone carvings of the warlike reptile with a headdress (similar to the Aztec god Quetzalcoatl). Rituals taking place on the temple platform, such as sacrifices, would have impressed the masses crowding below – they instilled fear, perhaps, but would also have given rise to a shared religious sensibility, a way of bringing cohesion to a large, multiethnic city.

Within the newly cleared tunnel were found huge numbers of fragments of the Storm God. Recognisable by his goggle-eyes, fangs and drops of blood, he was associated with water and fertility, as well as fire, lightning and destruction. The Storm God was the owner of the underworld’s sacred waters. At the de Young, a gallery places him alongside the Old Fire God, an elderly figure who sits cross-legged and bears a brazier atop his head. With them are the benevolent Water Goddess and the smooth-faced Maize God, the subject of the site’s famous stone masks who symbolised the life-sustaining power of the crop.

The inhabitants of Teotihuacan would have walked past thousands of square feet of bright illustrated surfaces: the site is celebrated for its red fresco murals, which decorated apartments and public spaces.

There are delicate paintings of flowering trees in the exhibition and, less delicately, an image of two coyotes eviscerating a deer. Animals are everywhere in the Teotihuacan visual world – and humans often merge into creatures. One vivid mural is of an anthropomorphic feline wearing a headdress and shell necklace. Another fragment, from the Street of the Dead is a menagerie of strange mythological hybrids. Yet another shows abird armed with serpent and spear.

More workmanlike objects, such as obsidian tools and incense burners, help to elucidate the historic urban structures – including living areas differentiated according to ethnicity, employment and rank. Immigrant groups from across Mesoamerica occupied distinct neighbourhoods: in this way, the development of Teotihuacan resembled that of such modern cities as London or New York.

The exhibition ends with a marble figure from an elite residential area. Notches in its arms and legs suggest it was tied with ropes to a post, in an echo of the ritual in which a high-ranking military captive was stripped, bound and shot with arrows.

But the standing figure’s particular significance lies in its connection to the demise of Teotihuacan: it was pieced together from more than 160 fragments, having been mutilated by chisels; the fragments were fire-damaged.

Such iconoclasm happened at the same time as the conflagration that razed the city in the sixth century. Who was responsible and why was it done? It is uncertain: as Matthew Robb, the curator of the show, has said, Teotihuacan resists interpretation as well as attracts it. Many mysteries remain.

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P. Natasha Covers Classical Archaeology news and has been with Histecho since 2017. She has a Master's degree in MA Archaeology from New York University's Science, Health and Environmental Reporting program. A California native, she also holds a Bachelor of science in molecular biology and a Master of Science in biology from the University of California, San Diego.

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