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Mexico Classical Antiquity Built: c. 100 BC–550 AD UNESCO

Teotihuacan

Teotihuacan was the largest city in the pre-Columbian Americas, stretching over 83 square kilometres and home to an estimated 125,000 people at its peak around 450 AD. The city is dominated by the massive Pyramid of the Sun, the Pyramid of the Moon, and the ceremonial Avenue of the Dead — a 4-kilometre boulevard aligned to astronomical phenomena. Despite its scale and sophistication, the identity of its builders and the language they spoke remain entirely unknown, as no deciphered writing system has been found. The city was mysteriously abandoned around 550 AD, possibly following internal unrest or environmental collapse, and later revered as a sacred place by the Aztecs, who believed the gods created the universe there.

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Teotihuacan

Mexico

Longitude: -98.8432

Latitude: 19.6925

Historical Significance

Teotihuacan shaped the cultural and religious trajectory of Mesoamerica for centuries after its fall — its architectural forms, iconography, and urban planning concepts were adopted by civilisations as distant as the Maya city-states. The site remains one of the most visited archaeological zones in the world and a UNESCO World Heritage Site, yielding extraordinary new discoveries as recent tunnel excavations beneath the Pyramid of the Moon reveal undisturbed ritual deposits.

Facts

Fact 1

Third-Largest Pyramid on Earth

The Pyramid of the Sun stands 65 metres tall and its base covers roughly 220,000 square metres, making it the third-largest pyramid in the world by volume, surpassed only by the Great Pyramid of Giza and the Great Pyramid of Cholula.

Fact 2

Unknown Builders

Despite being one of the largest cities in the ancient world, the ethnic identity and language of Teotihuacan's founders remain unknown — no deciphered script has been found, and genetic studies suggest the population was ethnically diverse.

Fact 3

A City of Apartments

Teotihuacan is unusual among ancient cities in that most of its population lived in large, single-storey apartment compounds rather than huts or houses — archaeologists have identified over 2,000 such compounds, some housing hundreds of people.

Fact 4

Sacrificial Foundations

Excavations beneath the Pyramid of the Moon and the Temple of the Feathered Serpent have uncovered mass sacrificial burials — including bound victims, jaguar skeletons, and jade offerings — placed during the pyramids' construction phases.

Fact 5

Obsidian Economy

Teotihuacan controlled major obsidian sources in central Mexico and exported carved obsidian tools and blades across Mesoamerica, making it the commercial hub of a vast trade network stretching from the Gulf Coast to the Maya lowlands.

Fact 6

Aztec Name, Not Original

The name "Teotihuacan" was given by the Aztecs centuries after the city's abandonment, meaning "the place where the gods were created" in Nahuatl — the original inhabitants' name for their own city is completely unknown.

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