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MEXICO CITY: The almighty eagle perched on a cactus while devouring a serpent on Mexico’s flag hints at the myth behind the foundation of the country’s capital.
It’s a divine sign in an ancient legend, according to which the god Huitzilopochtli asked a group called the Mexica — who founded what was later known as the Aztec Empire — to leave their homeland in search of a place to establish a new city.
It took some 175 years before they spotted the sacred omen and established the city of Tenochtitlan in 1325 where Mexico City stands today.
How the eagle, the cactus and the serpent became an emblem and endured through the European conquest is the focus of a new exhibition. “A coat of arms, an emblem, a symbol of identity,” runs through Dec. 15 at the Old City Hall in downtown Mexico City.
The exhibit is among the government’s activities marking the 700th anniversary of the founding of the Mexica capital.
“Recognizing Tenochtitlan doesn’t mean recalling a dead past, but rather the living heartbeat that still beats beneath our city,” President Claudia Sheinbaum said during an official ceremony in July. “It was the center of an Indigenous world that built its own model of civilization — one in harmony with the Earth, the stars, and its gods and goddesses.”
Fragments of that civilization lie underneath the Old City Hall, the current seat of Mexico City’s government.
Built by order of Spanish conqueror Hernán Cortés in 1522, its construction used stones from ancient Mexica sacred sites. The building has been renewed over time, but its halls have witnessed centuries of governance and symbolism.
“Holding the exhibition in this City Hall, a place of decisions and memory, is a way to recognize the history of those who once inhabited it and how its transformations still echo in Mexico City’s identity,” said Mariana Gómez Godoy, Director of Mexico City’s Cultural Heritage, during the exhibit’s inauguration in November.
A city’s mythic origin
The Mexica themselves recorded their story after Tenochtitlan fell to the Europeans. Several codices depict the path that led them to fulfill their deity’s task.
Eduardo Matos Moctezuma — an acclaimed archaeologist from Mexico’s National Institute of Anthropology and History — has argued that the legend is a symbolic retelling of historical events, rather than a literal claim about divine prophecy.
Still, according to the Templo Mayor Museum, the region’s pre-Hispanic people preserved the origin story of a long journey that led to the founding of Tenochtitlan as a cornerstone of their traditions.
They honored a small island in Lake Texcoco, now central Mexico City, as the place where the Mexica found the eagle foretold by Huitzilopochtli.
From ancient prophecy to national symbol
The new exhibit offers a historical overview of how the image evolved — from its establishment as the city’s coat of arms in 1523 under Emperor Charles V to its transformation into an emblem of Mexico as an independent nation.
Curated by researcher Guadalupe Lozada, it also displays images portraying how it was adopted by the religious orders in charge of converting the Indigenous people to Catholicism.
While the eagle and cactus were already adopted by Europeans in the mid-16th century, the Jesuits introduced the serpent decades later. “From then on, it would remain a symbol of the city’s identity — one that would also spread throughout the rest of New Spain,” Lozada said.
According to her, plenty of monasteries dating back to the 17th century attest to how friars displayed the eagle and cactus in their sanctuaries. Even today, the emblem can still be seen above the façade of Mexico City’s cathedral and inside one of its chapels.
“Such was the strength of Mexica culture that the evangelizers sought to adopt it rather than exclude it,” she said. “It was like saying, ‘I acknowledge your history.’”
The same logic applied with the European conquerors. Even as they ordered the destruction of the Mexica religious complexes, the representation of the foundational myth was not erased from history.
“For them, conquering a city like Tenochtitlan was a matter of pride and therefore they never intended to deny its existence,” Lozada said. “This meant that the strength of the city buried beneath the new one underlies it and resurfaces — as if it had never disappeared.”