Mexico's Teotihuacan ruins may have been "Teohuacan"

Veronica Ortega, an archaeologist at the National Institute of Anthropology and History, said a lesser-known Aztec document contained a pictogram referring to the city as a combination of sun, temple and ruler signs.

In the Xolotol Codex, which is in France, the word "Teohuacan" is written underneath.

But later Codices — Aztec pictographic documents drawn up to inform the Spanish about the land they had conquered — contain the spelling "Teotihuacan."

Ortega said the Spanish were uncomfortable with "Teohuacan" because the sun was a symbol for rulers and they wanted to concentrate all power in nearby Mexico City, the Aztec capital they conquered in 1521.

"They wanted people to see Teotihuacan as a place of worship, but not as a place where rulers were anointed, because they wanted to keep the political center in Tenochtitlan" — the Aztec name for Mexico City, Ortega said.

The debate may seem somewhat academic, because nobody knows what name the inhabitants of the city called it during its apex between 100 B.C. and A.D. 750, when it had about 100,000 residents.

The city was abandoned long before the rise of the Aztecs in the 14th century. Both Teotihuacan and Teohuacan are words in the Aztec's Nahuatl language, and nobody knows what language the people of Teotihuacan.

While she doesn't want to change road signs, or the official name of the ruins, Ortega said the implications of the name are important because the Aztec rulers continued to go to the city to legitimize their rule.

She said Montezuma, the last Azteca ruler, "led processions to Teotihuacan every 20 days," the length of an Aztec calendar month.