The Templo Mayor Is Completed and Dedicated With Mass Sacrifice
Ahuitzotl marks the finished pyramid with a sacrifice whose reported scale remains one of the most contested numbers in Aztec history
Quick facts
- Year completed
- 1487 CE
- Ruler
- Ahuitzotl
- Reported sacrifice figure
- 20,000 (contested, from Spanish sources)
- Context
- 5 years before Columbus's first voyage
What happened
In 1487 the Templo Mayor reached what World History Encyclopedia's own site chronology records as its completed form, inaugurated with a mass sacrifice of captives that later Spanish colonial sources put at 20,000 people over four days, using eight teams of priests working in relay according to the account preserved by the Yale-New Haven Teachers Institute. This figure, like most large Aztec sacrifice tolls, comes from post-conquest chronicles and cannot be independently verified against a contemporary record, and modern historians generally treat it as inflated even while accepting that a genuinely large mass sacrifice took place to mark the occasion. The event fell only five years before Columbus's first voyage reached the Caribbean, meaning the temple's completion and the Spanish arrival in the Americas were separated by less than a single generation.
Why it matters
Whatever the true number, the scale of this dedication was clearly meant to be seen and remembered, both by the Mexica themselves and by rulers of tributary and rival states invited to witness it. The event marks the high point of the Templo Mayor's physical construction, seven rebuilding phases in, just as the Triple Alliance was reaching the outer limits of what its military expansion could sustain.
How we know
The 20,000 figure comes from Spanish colonial chroniclers writing decades after the event based on secondhand Nahua testimony, the same category of source that historians treat cautiously across all large Aztec sacrifice tolls given the incentive those chroniclers had to emphasize Aztec brutality.
Sources
- World History Encyclopedia. Aztec Civilization · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Yale-New Haven Teachers Institute. 99.02.01: The Aztecs: A Pre-Columbian History · Reputable sourceteachersinstitute.yale.edu · The domain "teachersinstitute.yale.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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