Standing on the stone plaza at the foot of the Pyramid of the Moon in the early morning and looking southward, you behold a straight stone thoroughfare forty meters wide stretching more than two and a half kilometers between symmetrical stepped temple platforms. Rising to the left of that avenue, the volcanic stone mass of the Pyramid of the Sun towers sixty-five meters against the deep blue highland sky, while immediately behind the Pyramid of the Moon, the extinct volcano Cerro Gordo frames the northern horizon with slopes matching the exact angles of the four-tiered stone pyramid.
This is the Pyramids of the Sun and Moon Complex, Teotihuacan, the greatest ancient sacred metropolis of Mesoamerican civilization, situated in a side valley of the Basin of Mexico in the State of Mexico (Estado de México). Founded around 100 BCE and flourishing between the 1st and 6th centuries CE before being mysteriously abandoned around the 7th century, this monumental city moved the Aztecs who arrived centuries later to name it in Nahuatl Teotihuacan (meaning Place Where the Gods Were Born or Place Where Men Become Gods). In 1987, the entire archaeological city was inscribed as a UNESCO World Heritage Site.
IThe Myth of the Fifth Sun, the Feathered Serpent Quetzalcoatl, and Subterranean Caves
The first enduring mystery of Teotihuacan is that to this day archaeologists do not know with certainty what the original builders called their city or which language they spoke (scholars have proposed Totonac, Otomi, or early Nahua affinities). The name Teotihuacan, together with the names of the Pyramid of the Sun (Pirámide del Sol), the Pyramid of the Moon (Pirámide de la Luna), and the Avenue of the Dead (Calzada de los Muertos), were all bestowed by the Aztecs (Mexica) in the 14th and 15th centuries, more than seven hundred years after the metropolis had fallen.
To the Aztec emperors and priests of Tenochtitlan (as recorded in the 16th-century Florentine Codex compiled by Bernardino de Sahagún from indigenous elders), the colossal pyramids of Teotihuacan could not have been erected by ordinary mortals, representing instead the birthplace of the present cosmic era (the Fifth Sun). According to Mesoamerican myth, after four previous cosmic eras had been destroyed and the world lay in utter darkness, the gods gathered at Teotihuacan around a sacred sacrificial hearth to ask who would leap into the flames to become the new Sun. The humble, sore-covered god Nanahuatzin bravely cast himself into the fire first and rose into the sky as the blazing Sun, followed by the proud, wealthy god Tecuciztecatl, who leaped into the glowing ashes and became the Moon. Consequently, Aztec monarchs led regular royal pilgrimages on foot from Tenochtitlan to Teotihuacan to offer sacrifices to the gods and royal ancestors.
Through thousands of wall murals, stone sculptures, and ceramic vessels excavated on site, archaeologists of Mexico's National Institute of Anthropology and History (INAH) have reconstructed the actual pantheon venerated by the inhabitants of Teotihuacan between the 1st and 6th centuries CE. Occupying the supreme places of honor were three principal deities: the Great Goddess of Teotihuacan (often called the Spider Woman, presiding over nature, caves, subterranean waters, and fertility, associated with the Pyramid of the Moon), the Storm and Rain God (forerunner of the Aztec rain deity Tlaloc, depicted with goggle-ringed eyes and jaguar fangs), and the Feathered Serpent (forerunner of Quetzalcoatl, embodying the union of earth and sky, agricultural water, the calendar, and rulership).
Landmark archaeological discoveries in 1971 and robotic subterranean explorations between 2003 and 2017 revealed why the founders of Teotihuacan selected these exact spots for their pyramids. Six meters beneath the base of the Pyramid of the Sun, archaeologist Jorge Acosta discovered in 1971 a natural lava tube cave and tunnel stretching over 100 meters and terminating in a four-petalled chamber directly underneath the geometric center of the pyramid. Similarly, in 2003 archaeologist Sergio Gómez Chávez uncovered 18 meters beneath the Temple of the Feathered Serpent Quetzalcoatl a 103-meter man-made tunnel containing tens of thousands of jade, marine shell, and obsidian offerings, culminating in a miniature mountain landscape with pools of liquid mercury representing the rivers of the underworld.
Throughout ancient Mesoamerican cosmology, subterranean caves were revered as Chicomoztoc (the Place of the Seven Caves of human emergence) and portals to the watery underworld (Mictlan or Tlalocan), where springs and the seeds of life originate. By erecting the Pyramid of the Sun and the Temple of the Feathered Serpent directly atop these subterranean caves, the builders transformed each pyramid into a sacred Axis Mundi (World Axis) binding together the three cosmic realms: the dark watery underworld below, the earthly plane of humanity in the middle, and the celestial tiers of the Sun above.
IIEight Centuries from Obsidian Metropolis to the Sixth-Century Great Fire
The history of Teotihuacan chronicles the rise of the Western Hemisphere's first grid-planned metropolis, whose economic and religious influence reached Maya kingdoms in Guatemala over a thousand kilometers away before its collapse in the late 6th century.
- Circa 100 BCEEarliest agricultural settlements coalesce in the Teotihuacan ValleyFollowing the volcanic eruption of Xitle in the southern Basin of Mexico that buried the rival city of Cuicuilco, tens of thousands of people migrate into the Teotihuacan Valley, drawn by rich green obsidian deposits and perennial freshwater springs.
- 1st century to 150 CEPlanning of the Avenue of the Dead and building of the Pyramid of the SunDuring the Tzacualli and Miccaotli phases, the axial Avenue of the Dead is laid out and the Pyramid of the Sun is erected over the sacred cave using more than 2.5 million tons of earth, rubble, and volcanic stone alongside early stages of the Pyramid of the Moon.
- Circa 200 to 250 CECompletion of the Ciudadela and the Temple of the Feathered SerpentThe vast ceremonial enclosure of La Ciudadela is constructed in the southern sector, centered on the Temple of the Feathered Serpent carved with stone serpent heads and consecrated with over 200 sacrificial warrior burials.
- 250 to 450 CEGolden Age metropolis and expansion of influence into the Maya lowlandsDuring the Tlamimilolpa and Xolalpan phases, Teotihuacan covers over 20 km² with more than 2,000 mural-painted multi-family apartment compounds, housing over 125,000 inhabitants. In 378 CE, Teotihuacan general Siyaj K'ak' enters the Maya city of Tikal (Guatemala) and installs an allied dynasty.
- Circa 550 to 650 CETargeted burning of the ceremonial core and urban declineIn the late 6th century, palaces and temples along the Avenue of the Dead are selectively burned and elite statues smashed (widely interpreted by scholars as an internal uprising triggered by severe drought and social crisis), leading to the gradual abandonment of the city.
- 14th to 16th centuryAztec pilgrimage veneration and naming of TeotihuacanAztec rulers adopt the ruins as their supreme pilgrimage sanctuary, naming the site Teotihuacan and modeling art and architecture in Tenochtitlan upon its monuments.
- 1905 to 1987Modern archaeological excavations and UNESCO World Heritage inscriptionLeopoldo Batres excavates the Pyramid of the Sun from 1905 to 1910, followed by Manuel Gamio (discovering the Temple of Quetzalcoatl in 1917) and Rene Millon's 1960s mapping project. In 1987, Teotihuacan is inscribed on the UNESCO World Heritage List (ref. 414).
On the Aztec misidentifications behind the names Avenue of the Dead and Pyramid of the Sun. When the Aztecs arrived in the valley in the 14th century and saw dozens of low, square rubble-covered mounds lining both sides of the two-kilometer central thoroughfare, they assumed those mounds were royal burial tombs and named the street in Nahuatl Miccaotli (Avenue of the Dead, Calzada de los Muertos). Modern archaeology has demonstrated that those mounds were not tombs at all, rather flat-roofed civic-ceremonial platforms and residential palaces. Similarly, excavations inside the Pyramid of the Sun and Pyramid of the Moon indicate that the original Teotihuacanos likely dedicated these two monuments to the Storm and Rain God (Tlaloc) and the Great Water Goddess rather than to the Sun and Moon of later Aztec lore.
IIIThe Avenue of the Dead, Talud-Tablero Architecture, and the Three Volcanic Stone Pyramids
The entire 20-square-kilometer urban grid of Teotihuacan is organized orthogonally around its monumental spine, the Avenue of the Dead (Calzada de los Muertos). Measuring 40 meters wide (expanding to 95 meters in open plazas) and running for more than 2.4 kilometers (nearly 4 kilometers including its southern extension), this lime-plastered processional avenue links the Plaza of the Moon at the northern terminus with the Ciudadela enclosure in the south. Because the valley floor rises roughly 30 meters from south to north, ancient planners divided the avenue into a series of sunken plazas connected by broad transverse stone staircases: when looking northward from the southern end, the stacked risers of these staircases create a dramatic visual illusion of a single continuous stairway ascending straight up to the Pyramid of the Moon.
The signature architectural vocabulary of Teotihuacan (which subsequently spread across Mesoamerica) is the Talud-Tablero profile (sloping apron and vertical panel): each stepped tier of a pyramid or platform consists of an inward-sloping stone base wall (talud) supporting a cantilevered rectangular vertical frame (tablero) bordered by projecting stone moldings and richly decorated with carved reliefs or crimson murals.
Rising on the eastern side of the Avenue of the Dead, this is the largest monument at Teotihuacan and one of the largest ancient pyramids in the world (third by volume after the Great Pyramid of Cholula in Puebla and the Great Pyramid of Khufu in Egypt). Its square base measures approximately 225 by 225 meters and its current height reaches about 65 meters across five massive stepped tiers, ascended on its western face by a monumental stairway of 248 stone steps leading to the flat summit where a temple once stood.
Anchoring the northern terminus of the Avenue of the Dead, the Pyramid of the Moon measures 140 by 150 meters at its base and stands 43 meters tall (built through seven successive superimposed construction phases). Although 22 meters lower in absolute height than the Pyramid of the Sun, it rests upon higher ground at the northern end of the valley so that the summits of the two pyramids stand at nearly identical elevations above sea level. In front of the pyramid juts a five-tiered platform facing the Plaza of the Moon, framed by 12 symmetrical temple platforms and a central altar.
Near the southern end of the Avenue of the Dead lies a vast sunken quadrangle measuring 400 by 400 meters known as La Ciudadela (capable of holding 100,000 people). At its center rises the six-tiered Temple of the Feathered Serpent (Templo de Quetzalcoatl) built in Talud-Tablero style: its stone facades preserve dozens of projecting tenoned stone heads of the Feathered Serpent Quetzalcoatl (emerging from eleven-petalled collars) alternating with goggle-eyed masks of the Storm God Tlaloc amid carved seashells along the undulating serpent bodies.
Adjacent to the southwestern corner of the Plaza of the Moon stands the Palace of Quetzalpapálotl (Palace of the Quetzal-Butterfly), featuring a colonnaded courtyard whose square basalt pillars are carved in low relief with mythical quetzal-butterfly birds inlaid with black obsidian eyes, above the subterranean Temple of the Feathered Conch Shells (Templo de los Caracoles Emplumados). Surrounding residential districts such as Tepantitla (famous for the Paradise of Tlaloc mural) and Tetitla preserve vibrant mineral-pigment frescoes.
Testifying to the civil-engineering mastery of Teotihuacan's planners, the natural course of the San Juan River (Río San Juan) just north of the Ciudadela was artificially canalized and straightened over several kilometers so that the river crosses the Avenue of the Dead at an exact 90-degree angle in alignment with the city's East-West street grid.
| Monument | Location on the urban axis | Dimensions and key features |
|---|---|---|
| Avenue of the Dead (Calzada de los Muertos) | Central North-to-South spine (15.5° East of North) | 40 m to 95 m wide, over 2.4 km long, linking stepped plazas and temple platforms |
| Pyramid of the Sun (Pirámide del Sol) | East side of the Avenue of the Dead (center) | 225 m x 225 m square base, ~65 m high, 248 steps, built directly over a sacred cave |
| Pyramid of the Moon (Pirámide de la Luna) | Northern terminus of the Avenue of the Dead | 140 m x 150 m base, 43 m high, 7 superimposed building stages, echoing Cerro Gordo |
| Temple of the Feathered Serpent (La Ciudadela) | Southern sector (south of the San Juan River) | 400 m x 400 m quadrangle, 6-tiered pyramid carved with Quetzalcoatl and Tlaloc heads |
| Palace of Quetzalpapálotl | Southwest corner of the Plaza of the Moon | Basalt pillar courtyard carved with quetzal-butterfly motifs and 3rd-to-5th-century murals |
IVThe Lie of the Land and Orientation
Ancient Mesoamerican civilization did not use East Asian compass geomancy, designing the sacred city of Teotihuacan instead according to Mesoamerican Archaeoastronomy combined with Water-Mountain symbolism (Altepetl in Nahuatl, conceiving each pyramid as an artificial sacred mountain over subterranean water and aligning the city grid to solar horizon positions and the Pleiades star cluster on key dates of the 260-day sacred calendar). Below is a comparative reading of Teotihuacan's topography through the library's framework of traditional landform analysis.
Examining the macro-topography at coordinates 19.6925 degrees North, 98.8438 degrees West (at an elevation of 2,300 meters above sea level), few ancient cities on earth display such an intentional mirroring between Natural Mountain Form and Constructed Pyramid Form as Teotihuacan. Directly north of the city rises the extinct volcano Cerro Gordo (3,050 meters high, called Tenan in Nahuatl, meaning Stone Mother, whose volcanic slopes feed the springs watering the valley). When ancient architects sited the Pyramid of the Moon at the northern terminus of the Avenue of the Dead, they proportioned its height and slope so that for an observer walking northward along the avenue, the Pyramid of the Moon sits directly in front of and replicates the exact silhouette of Mount Cerro Gordo behind it. Read through classical landform principles, Mount Cerro Gordo serves as the grand Ancestral Mountain and Rear Backing (Rear Backing Mountain (Hou Zhen)) anchoring the north, while the Pyramid of the Moon acts as the focal node receiving the mountain dragon vein (Dragon Vein (Long Mai)) and channeling its vital breath straight down the ceremonial axis of the city.
In terms of axial orientation and celestial-topographic alignment, the Avenue of the Dead runs along a North-Northwest to South-Southeast axis rotated exactly 15 degrees 30 minutes (15.5 degrees) East of true North, while the main facades of the Pyramid of the Sun and the Temple of the Feathered Serpent face perpendicular to the avenue toward West-Northwest (15.5 degrees North of true West). This 15.5-degree orientation unites sky and earth: astronomically, the western face of the Pyramid of the Sun points directly toward the spot on the western horizon where the Sun sets on August 12 and April 29 each year (two dates separated by exactly 260 days, the length of the sacred Mesoamerican Tzolkin or Tonalpohualli ritual calendar, with August 12 also marking the mythical creation date of the present era in 3114 BCE in the Maya Long Count). Topographically, the East-West axis extends westward to the peak of Cerro Maravillas, while the North-South axis runs from Mount Cerro Gordo across the canalized San Juan River (serving as an inner bright hall (Bright Hall (Ming Tang)) retaining water qi) toward the Cerro Patlachique range in the south as the front screen (Front Table Mountain (Qian An)). Directly beneath the center of the Pyramid of the Sun, the natural subterranean cave functions as an underground qi-gathering node (Dragon Spot (Xue)), completing a remarkable triad of Heaven, Earth, and Humanity.
VSpring Equinox Solar Gatherings and Cultural Observances at the Ancient Metropolis
Today, as the most visited archaeological sanctuary in Mexico (administered by the National Institute of Anthropology and History, INAH), Teotihuacan is the focal point of annual solar-calendar alignments and indigenous heritage gatherings reckoned by the solar calendar (Gregorian calendar). The table below summarizes the key astronomical and cultural dates observed at the site.
| Time | Calendar system | Event and astronomical alignment | Observances at the Teotihuacan Complex |
|---|---|---|---|
| March 20 or 21 annually | Solar calendar (Astronomical equinox) | Spring Equinox Gathering (Equinoccio de Primavera) | Tens of thousands of Mexican citizens and international visitors dressed in white with red scarves gather along the Avenue of the Dead and around the Pyramid of the Sun at dawn, raising their hands toward the rising spring sun amid traditional Conchero shell-horn and drum dances. |
| April 29 and August 12 annually | Solar calendar and Ancient 260-day Sacred Calendar | Solar Sunset Alignment along the Axis of the Pyramid of the Sun | Archaeoastronomers and cultural observers gather before the western staircase of the Pyramid of the Sun at dusk to watch the solar disc sink into the western horizon in exact alignment with the central axis of the pyramid and its subterranean cave. |
| May 19 and July 25 annually | Tropical astronomical calendar | Solar Zenith Passage at the Latitude of Teotihuacan (Paso Cenital del Sol) | At solar noon on these two dates at latitude 19.69° North, the Sun stands directly overhead at 90 degrees so that vertical stone monuments and the Pyramid of the Sun cast no lateral shadow, heralding the agricultural rainy season. |
| Late October to November 2 annually | Gregorian calendar | Day of the Dead Commemorations and Dawn Hot-Air Balloon Flights | Communities across the Teotihuacan Valley erect marigold (Cempasúchil) altars honoring ancestors while hundreds of hot-air balloons drift across the dawn sky above the Pyramids of the Sun and Moon. |
The precision of the sunset alignments and zenith passages on fixed dates of the year at Teotihuacan demonstrates how the entire complex of pyramids and avenues functioned as a monumental stone calendar regulating agricultural and ritual life across ancient Mesoamerica.
VILocation And How To Get There
- Address
- Huyện San Juan Teotihuacán và San Martín de las Pirámides, Bang México (Estado de México), cách Thành phố México 40 km về phía đông bắc
- Getting there
- The Teotihuacan archaeological zone lies approximately 40 kilometers northeast of central Mexico City. From Mexico City, you can take the Metro (Line 5) to the Northern Bus Terminal (Terminal Central de Autobuses del Norte), where dedicated Autobuses Teotihuacán coaches depart from Gate 8 every 15 to 20 minutes and take about 1 hour directly to Gate 1 or Gate 2 of the archaeological park.
- Coordinates
- 19.6925, -98.8438
Because the Teotihuacan archaeological zone stretches across an open highland plain with virtually no shade along the 2.4-kilometer Avenue of the Dead, please wear a wide-brimmed hat, sunscreen, and comfortable walking shoes, and carry ample drinking water. Under current heritage conservation regulations enforced by Mexico's National Institute of Anthropology and History (INAH) to protect the ancient stone steps from erosion, visitors are no longer permitted to climb the staircases of the Pyramid of the Sun or the Pyramid of the Moon, though you may walk the full length of the Avenue of the Dead, enter the Plaza of the Moon, examine the carved stone serpent heads at the Temple of Quetzalcoatl, and visit both the Teotihuacan Site Museum and the Beatriz de la Fuente Murals Museum within the park.
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?Quick Questions
What does the name Teotihuacan mean, and was the city built by the Aztecs?
Teotihuacan was not built by the Aztecs. The city was founded around 100 BCE and flourished between the 1st and 6th centuries CE, many centuries before the rise of the Aztec Empire. When the Aztecs arrived in the valley in the 14th century, the metropolis had long been abandoned. Awestruck by the scale of its monuments, the Aztecs named it in Nahuatl Teotihuacan, meaning Place Where the Gods Were Born or Place Where Men Become Gods.
How large is the Pyramid of the Sun at Teotihuacan, and what lies hidden beneath it?
The Pyramid of the Sun is the largest structure at Teotihuacan and one of the largest ancient pyramids in the world, measuring approximately 225 by 225 meters at its square base and rising about 65 meters high. In 1971, archaeologists discovered 6 meters beneath the pyramid a natural lava-tube tunnel over 100 meters long leading to a four-petalled cave chamber directly underneath the center of the pyramid, revered in antiquity as a place of cosmic origin and an entrance to the underworld.
Why is the Pyramid of the Moon shorter than the Pyramid of the Sun while their summits reach the same elevation?
The Pyramid of the Moon stands 43 meters tall (about 22 meters shorter than the Pyramid of the Sun), yet because ancient planners built the Pyramid of the Moon at the northern end of the Avenue of the Dead where the natural valley floor is roughly 30 meters higher than the southern end, the summits of both pyramids sit at nearly the same elevation above sea level. Its profile also mirrors the slopes of Mount Cerro Gordo directly behind it.
Where is the Temple of the Feathered Serpent Quetzalcoatl located within Teotihuacan?
The Temple of the Feathered Serpent (Templo de Quetzalcoatl) stands at the center of the vast sunken quadrangle known as La Ciudadela at the southern end of the Avenue of the Dead (near Gate 1). This six-tiered stepped pyramid is renowned for its stone facades carved with projecting heads of the Feathered Serpent Quetzalcoatl alternating with masks of the Storm God Tlaloc, as well as an 18-meter-deep subterranean tunnel filled with jade offerings and liquid mercury discovered in 2003.
Why is the Avenue of the Dead at Teotihuacan oriented 15.5 degrees east of true north?
The Avenue of the Dead is rotated 15 degrees 30 minutes east of true north so that the perpendicular western facade of the Pyramid of the Sun faces the exact point on the western horizon where the Sun sets on August 12 and April 29 each year. The interval from August 12 to April 29 of the following year spans exactly 260 days, matching the sacred 260-day ritual calendar of ancient Mesoamerica.