An ancient unknown writing system has been identified in the ruins of Teotihuacan, a once-thriving city in central Mexico that dates back over 2,000 years. Researchers say the discovery could offer critical insight into the language and identity of the city’s long-lost inhabitants.
In a study published in Current Anthropology, University of Copenhagen researchers Magnus Pharao Hansen and Christopher Helmke presented evidence that symbols found on Teotihuacan murals and pottery are more than decorative art. They argue the signs represent a structured writing system that recorded an early form of the Uto-Aztecan language family.
Teotihuacan, founded around 100 B.C. and abandoned by 600 A.D., was one of the largest and most influential cities in ancient Mesoamerica, home to an estimated 125,000 people at its peak. Despite its historical prominence, little is known about who lived there or what language they spoke. Hansen and Helmke’s findings could shift that narrative.
Linguistic patterns point to Uto-Aztecan roots
The researchers analyzed hundreds of logograms—symbols that appear on the city’s vibrant murals and ceramics—and found patterns that suggest phonetic and conceptual usage. Some signs represent literal meanings, like an image of a coyote indicating the word “coyote.” Others act more like a rebus, where the sound of each symbol contributes to a more abstract word.
Examples of Teotihuacan writing.#History #historyteacher #mexico #native #nativeart #indigenous #teotihuacan #otomi #hñahñu #culture pic.twitter.com/IqdaDuXlWl
— Anahuac Encyclopedia (@AnahuacAmoxtli) October 20, 2020
Decoding this system required reconstructing an early version of Nahuatl, the language later spoken by the Aztecs and still used today in parts of Mexico. According to Helmke, trying to interpret the texts using only modern Nahuatl would be as ineffective as reading ancient Danish runes with today’s Danish. The language had to be brought closer to its original form for meaningful analysis.
The study also challenges long-standing views about Aztec migration. Until now, scholars believed Nahuatl speakers arrived in central Mexico after Teotihuacan fell. Hansen and Helmke suggest the linguistic connection points to much earlier roots, possibly making the Aztecs direct descendants of Teotihuacan’s original population.
Limited evidence, but strong academic interest
Deciphering the writing is complicated by limited sources. Many inscriptions remain undiscovered, and only fragments exist today. Hansen noted that finding more examples of the same signs used in consistent ways would greatly strengthen their theory.
The research has drawn international attention. Hansen and Helmke plan to host academic workshops to collaborate with other experts and refine their method. They believe their framework lays a foundation for further study of Mesoamerican scripts.
If confirmed, their work not only decodes a writing system but may also rewrite the story of one of ancient Mexico’s most mysterious civilizations.
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