Teotihuacan’s Pyramid of the Sun was raised by a people whose name is still unknown

The Pyramid of the Sun, the towering centerpiece of the ancient city of Teotihuacan in central Mexico, is one of the largest structures built anywhere in the pre-Columbian Americas. It rises about 216 feet above the surrounding plain, and it was completed roughly 1,800 years ago by a civilization whose own name for itself has never been recovered. The people who conceived and raised it left no readable writing to identify them, so the culture behind one of the hemisphere’s most ambitious monuments remains, in a literal sense, anonymous.

A mountain built by human hands

The scale of the pyramid is its first and most obvious claim to attention. Its base measures roughly 220 by 230 metres, comparable in ground area to the Great Pyramid of Giza, though it does not reach the same height. Rising in a series of sloping tiers to a summit that once carried a temple, it is among the largest structures of its kind in the Western Hemisphere and dominates the valley in which Teotihuacan sits.

It was constructed largely of adobe brick and rubble, faced with stone and once covered in plaster and painted decoration that has long since weathered away. Estimates place its principal construction around 200 CE, part of a burst of monumental building that transformed Teotihuacan into one of the great cities of the ancient world well before the rise of the Aztec Empire many centuries later.

Builders who left no name

The identity of the people who built Teotihuacan is one of the enduring puzzles of Mesoamerican archaeology. The city had no deciphered script that names its rulers or its inhabitants, and scholars continue to debate the ethnicity and language of its population. The UNESCO World Heritage listing for Teotihuacan describes a city that was one of the most powerful cultural centres of its era, yet the civilization that produced it cannot be tied with certainty to a single named people.

What evidence survives suggests a cosmopolitan population. Excavations have found neighborhoods associated with groups from across Mesoamerica, including people connected to the Maya, Zapotec and other cultures, pointing to a metropolis that drew residents from a wide region. That diversity may itself be part of why no single ethnic label fits, since Teotihuacan appears to have been a melting pot rather than the seat of one homogeneous nation.

A name given by later visitors

Even the familiar names attached to the site come not from its builders but from the Aztecs, who arrived centuries after the city had been abandoned and its monuments partly ruined. Encountering the enormous pyramids, the Aztecs called the place Teotihuacan, often translated as the place where the gods were created, and it was they who named the two largest structures the Pyramid of the Sun and the Pyramid of the Moon. The names the original inhabitants used for these buildings are unknown.

This layering of memory means that the monument is known today through the eyes of a culture that regarded it with awe as an ancient and sacred ruin. To the Aztecs, Teotihuacan was already a place of legend, a site so old and imposing that they wove it into their own creation mythology rather than claiming it as their own construction.

The cave beneath the summit

One of the more intriguing discoveries at the pyramid lies underneath it. A natural cave and tunnel system was found beneath the structure, running toward a chamber below the center of the pyramid. Reporting on the wider city has highlighted how such features may have carried deep religious meaning, and National Geographic’s account of who built Teotihuacan underscores how much about the city’s beliefs is inferred from architecture rather than read from texts.

Caves held powerful associations in Mesoamerican cosmology, often linked to origins, the underworld and the emergence of humanity. The decision to raise the Pyramid of the Sun above such a feature suggests the location was chosen for its sacred significance, and that the monument was meant to mark a place already regarded as a point of contact between worlds.

The city that surrounded the pyramid

The Pyramid of the Sun did not stand alone. It was the largest element in a planned city organized around a broad central axis now called the Avenue of the Dead, which links the Pyramid of the Sun, the Pyramid of the Moon and a large enclosed compound sometimes called the Citadel. Britannica’s description of the pyramid and its setting situates it within this deliberately laid-out urban plan, one of the earliest examples of large-scale city planning in the Americas.

At its height, Teotihuacan was home to a population that ran into the tens of thousands, supported by agriculture, craft production and long-distance trade in goods such as obsidian. Apartment-like compounds housed much of the population, and murals preserved on their walls provide some of the richest surviving evidence for the beliefs and daily life of a people who left no narrative history.

Abandonment and the long afterlife of a ruin

Teotihuacan declined and was largely abandoned several centuries before the Aztecs arrived, for reasons still debated, with theories ranging from internal unrest to environmental strain. The great pyramids were left standing, weathering into the landscape until they became objects of wonder for later civilizations and, eventually, of systematic study.

The site was inscribed as a World Heritage location in 1987 and remains one of the most visited archaeological complexes in Mexico. Each year, crowds climb toward the summit of the Pyramid of the Sun, standing on a monument whose builders shaped the course of Mesoamerican history yet whose name for themselves has slipped entirely out of the record, leaving the structure to speak for a people it can no longer identify.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

More from Morning Overview