Every year around mid-March, many people in Mexico reflect on one of the most pivotal moments in the country’s history—the fall of Tenochtitlan, the mighty capital of the Mexica (Aztec) Empire. While the most widely recognized date is in August, discussions and commemorations in March often highlight the broader anniversary period tied to the final campaign led by the Spanish and the events that ultimately reshaped Mesoamerica forever.
In this article, we explore the historical background, the significance of March 13 in the rise and fall of Tenochtitlan, in the narrative of the conquest, in the fall of Tenochtitlan, and in Mexican identity today.
What Was Tenochtitlan?
According historical sources of the 16th century, March 13, 1325 (2 houses in the Mexica calendar) is considered to be the date in which the great Tenochtitlan was founded. According to historical Mesoamerican oral and pictographic sources, along with manuscript chronicles, written by both Spaniards and Nahua Indians of different origins, March 13, 1325 (2 houses in the Mexica calendar) is considered to be the date in which the great Tenochtitlan was founded. It was on this date: “when the Aztec Mexican elders entered, arrived and settled within the tular and reedbed, of the water in Tenochtitlan.” This was a prophecy made by the god Huitzilopochtli, which told the Aztecs (Mexica) that they should look for a lake with an eagle perched on a prickly pear cactus with a snake in its talons. This took the Aztecs on a pilgrimage of 210 years, 4 periods of 52 years of the cycle of the Aztec calendar. On that date, they settled in Lake Texcoco where they founded the city of Tenochtitlan, present-day Mexico City.
The foundation of the Aztec empire constitutes an allegorical representation that encompasses more than the origin of the Aztecs (Mexica), from their remote past and ancient lineage. The Mexica found the determination that led them to dominate all of Mesoamerica, once their political and economic power was consolidated.
Founded in 1325, Tenochtitlan was one of the largest and most sophisticated cities in the world, with an estimated population of 200,000 to 300,000 inhabitants. The city stood on an island in Lake Texcoco, in what is now Mexico City. Tenochtitlan was the political, economic, and religious heart of the Mexica Empire. It had impressive temples, causeways, canals, and marketplaces. At the center stood the Templo Mayor, a sacred site that symbolized the empire’s spiritual power.

The Road to the Fall: March 13 and the Conquest of Mexico
After earlier encounters with Moctezuma II, tensions between the Spanish and the Mexica escalated into open conflict.
By early 1521, The Spanish and their Indigenous allies were preparing for a decisive siege, and March 13 is often referenced in historical discussions as part of the final campaign period.
The months that followed were critical in determining the outcome of the conflict. The siege that followed led to widespread destruction, famine, and disease within Tenochtitlan.
The year 1521 marked the final stage of the Spanish conquest.

Commemorations and Historical Reflection
In recent years, especially around major anniversaries such as the 500th anniversary in 2021, the Mexican government and cultural institutions have organized exhibitions, ceremonies, and academic events in Mexico City.
These commemorations often aim to:
- Re-center Indigenous perspectives
- Recognize the impact of colonization
- Promote dialogue about historical memory
Rather than emphasize, reflections tend to emphasize resilience and cultural continuity.
Tenochtitlan’s Legacy Today
Although Tenochtitlan no longer stands, its legacy lives on beneath the streets of Mexico City. Archaeological discoveries continue to reveal artifacts, temples, and remnants of the original city.
Visitors can explore these remains at sites near the historic center, where layers of history—from Mexica foundations to colonial architecture—coexist in one of the world’s most dynamic cities.
Conclusion
The March 13 anniversary discussions surrounding the fall of Tenochtitlan serve as a reminder of a transformative chapter in Mexican history. While August 13, 1521, marks the official fall, the events of early 1521—including the strategic maneuvers and preparations in March—were decisive in shaping the outcome.
Understanding the story of Tenochtitlan is essential to understanding Mexico itself. It is a story of power, conflict, transformation, and enduring cultural identity—one that continues to resonate more than 500 years later.
Author: AllMexicoStore
References
13 de marzo de 1325. Fundación de Tenochtitlan. – Museo Legislativo
Did you know?
The place where the Aztecs (Mexica) started their journey has not been verified.



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