Record · Classical world · The Americas · AD 200 · Places & monuments · Mysteries & discoveries

How big was Teotihuacan, and who ran it?

Edited by Song Letter · Researched and written with AI assistance, checked against the sources below · How we make it

Published 2026-09-19 · 7 min read

the Pyramid of the Sun and the Avenue of the Dead seen from the Pyramid of the Moon — The Pyramid of the Sun and the Avenue of the Dead at Teotihuacan, seen from the Pyramid of the Moon. Arian Zwegers from Brussels, Belgium / CC BY 2.0. Source

TL;DR — Teotihuacan covered about eight square miles and held 100,000 to 200,000 people by AD 400. No royal portrait or tomb has been found; who governed it is debated.

Teotihuacan, in the Basin of Mexico, covered about eight square miles and held 100,000 people or more around AD 400, and no one knows who ruled it. The city lay some 30 miles (50 kilometers) northeast of what is now Mexico City. Its two great pyramids and central avenue were finished by about AD 200, and its population peaked between about 375 and 500. Excavators have found thousands of apartment compounds, foreign neighborhoods and mass burials of sacrifice victims, but no statue, tomb or inscription that names a king. Around AD 550 the temples and palaces along the main avenue burned, and the center was never rebuilt.

Quick facts

When: Settled c. 400 BC, built c. AD 100–250 · peak c. AD 375–500 · central fire c. AD 550–570 · abandoned by c. AD 750
Where: Basin of Mexico, about 30 miles (50 km) northeast of what is now Mexico City
Who: The Teotihuacanos (original name unknown); archaeologists George Cowgill, Linda Manzanilla, Sergio Gómez (INAH)
Outcome: Largest city in the Western Hemisphere before the 1400s; its core burned and no royal portrait or tomb has been found

A planned city on a grid

The site was settled as early as 400 BC, Smithsonian magazine reported in 2016, and the metropolis of boulevards and pyramids was built around AD 100; INAH’s site description says that by the third century AD the Pyramid of the Sun, the Pyramid of the Moon and the Avenue of the Dead were standing. Its builders laid the streets on a measured rectangular grid oriented, in the words of the Boston University archaeologist Clemency Coggins, to the movement of the sun. The main axis, which the Aztecs later called the Avenue of the Dead, ran for more than two miles. Along it stood the Pyramid of the Sun, the Pyramid of the Moon, and the walled Ciudadela, 400 meters on a side by INAH’s measurement, with the Temple of the Feathered Serpent, one of the oldest buildings in the city.

INAH gives the Pyramid of the Sun as 224 meters on a side and 65 meters high; the UNESCO World Heritage listing gives 225 by 222 meters and 75 meters. George Cowgill, an archaeologist at Arizona State University, told National Geographic that the city covered eight square miles and supported about 100,000 people. “It was the largest city anywhere in the Western Hemisphere before the 1400s,” he said. Smithsonian magazine reported in 2016 that by AD 400 the residential zones “may have housed 200,000 people.”

Who lived in the apartment compounds

Most people lived in one-story walled compounds of rooms set around courtyards. Smithsonian magazine counts some 2,000 of them; an Arizona State University report in 2011 gave about 2,300, each with three to five apartments.

The residents came from far beyond the valley. Linda Manzanilla of the National Autonomous University of Mexico, writing in the Proceedings of the National Academy of Sciences in 2015, described a multiethnic settlement whose foreign groups settled mostly on the edges: the Oaxaca Barrio, or Tlailotlacan, in the southwest; the Merchants’ Barrio of Gulf Coast people in the east; and a small group from Michoacán in the west. Obsidian paid for much of it. The city controlled the deposits at nearby Pachuca and turned the volcanic glass into spear and dart points, and its pottery turns up in elite burials as far south as the Maya city of Tikal.

The ruler who left no face

Maya kings carved their portraits on stone and were buried under their temples. Teotihuacan has yielded neither. Smithsonian magazine described a split among specialists in 2016. One camp, which included Saburo Sugiyama of Arizona State University, held that a powerful king ruled the city. The other held that a council of elite families governed it. Cowgill, in the 2011 Arizona State report, described the city as most likely governed by a collective rulership. In a 2026 paper in Latin American Antiquity, Manzanilla described a state built on a pact among roughly 22 neighborhoods, with possible co-rulers living in the palace of Xalla north of the Pyramid of the Sun.

The clearest sign of central power is the Temple of the Feathered Serpent. INAH records offerings in its foundations that consisted mainly of human remains, dedicated to the building or to the god; the Arizona State University report of 2011 estimated that more than 200 victims of human sacrifice lie buried inside the city’s pyramids.

The tunnel under the temple

In the fall of 2003 a rainstorm opened a sinkhole about three feet wide at the foot of the Temple of the Feathered Serpent. Sergio Gómez, an archaeologist at Mexico’s National Institute of Anthropology and History (INAH), climbed down into a man-made tunnel blocked in both directions by large stones. Radar surveys in 2004 and 2005 traced it about 330 feet (100 meters) to a point under the temple’s center; its entrance had been sealed with boulders nearly 2,000 years earlier. Digging began in 2009. Two robots, Tlaloque and Tláloc II, scouted the final stretch and found a cross-shaped chamber. By 2016 the team had recovered about 75,000 objects, among them obsidian knives and two black stone statues. The royal tomb that the press expected has not appeared, and Gómez came to read the chamber as a symbolic resting place for the city’s founders.

Carved stone serpent and headdress reliefs on the facade of the Temple of the Feathered Serpent — Facade of the Temple of the Feathered Serpent at Teotihuacan; the sealed tunnel was found at its foot in 2003. https://www.flickr.com/photos/rosemania/ / CC BY 2.0. Source

Fire around AD 550

Manzanilla dated the burning of the major buildings along the Avenue of the Dead to AD 550 in 2015; in 2026 she placed the “Great Fire” at about AD 550 to 570. UNESCO’s listing gives the city a life from the first century to the seventh. Temples and palaces on the central axis burned, sculptures inside Xalla were smashed, and the neighborhoods on the edges were mostly spared. Manzanilla found no trace of a foreign army and read the event as a revolt against the ruling elite; INAH’s site description says the center was damaged “apparently by sectors of the population itself.” Lake sediments show a long drought beginning about the same time. The periphery stayed occupied for a century more; Smithsonian magazine puts the final abandonment at about AD 750.

What the Aztecs found

When Nahuatl-speaking groups reached the valley, in the 1200s or 1300s depending on the account, the pyramids had stood in ruins for about 700 years. They called the place Teotihuacan, which INAH translates as “place of the gods” or “place of deification.” No glyph has given up what the residents called their home.

The scale is well measured; the government is not. A city that outgrew every other in its hemisphere for four centuries has left more than 2,000 apartment compounds, at least 200 sacrifice victims and 75,000 objects in one sealed tunnel, and not a single face of a ruler.

Key facts

Teotihuacan lay about 30 miles (50 kilometers) northeast of what is now Mexico City and covered about eight square miles (21 square kilometers).
Population estimates run from about 100,000 (George Cowgill) to as many as 200,000 (Smithsonian magazine) at the peak, c. AD 375–500.
The Pyramid of the Sun (c. AD 100) measured about 215 meters on a side; its height is given as 60 to 75 meters depending on the source.
More than 2,000 walled apartment compounds housed the population; foreign quarters included the Oaxaca Barrio and the Merchants’ Barrio.
No portrait, tomb or inscription of a king has been found; Cowgill and Linda Manzanilla favored collective rule, Saburo Sugiyama a single king.
More than 200 sacrificed people were buried in the Temple of the Feathered Serpent around AD 200; a tunnel found beneath it in 2003 by Sergio Gómez (INAH) yielded about 75,000 objects by 2016.
The core of the city burned around AD 550–570; the site was largely abandoned by about AD 750.

FAQ

How big was Teotihuacan?

About eight square miles (21 square kilometers), with 100,000 people or more at its peak around AD 400; some estimates reach 200,000. Cowgill called it the largest city in the Western Hemisphere before the 1400s.

Who ruled Teotihuacan?

Unknown. No royal portrait, tomb or name has been found. Cowgill and Manzanilla argued for collective rule by elite families or neighborhoods; Sugiyama argued for a powerful king.

Why was Teotihuacan abandoned?

Its central temples and palaces burned around AD 550–570. Manzanilla read the fire as an internal revolt, with no sign of foreign invasion, and a long drought began about the same time. The periphery stayed occupied for a century or more; the site was largely empty by about AD 750.

Sources

The whole world at about the same time: The world in AD 200

Cite this article

APA: Song Letter. (2026, September 19). How big was Teotihuacan, and who ran it? Our Earth's History. https://ourearthshistory.com/americas/classical/teotihuacan-largest-city-americas-no-king/
Chicago: Song Letter. “How big was Teotihuacan, and who ran it?” Our Earth's History, September 19, 2026. https://ourearthshistory.com/americas/classical/teotihuacan-largest-city-americas-no-king/.
MLA: Song Letter. “How big was Teotihuacan, and who ran it?” Our Earth's History, 19 Sep. 2026, https://ourearthshistory.com/americas/classical/teotihuacan-largest-city-americas-no-king/.

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