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15th-16th century CEReputable source · 2 sourcesDebated

Human Sacrifice at the Templo Mayor: Belief and Disputed Scale

The Aztecs fed their gods with human blood as a matter of cosmic obligation, but the death tolls in Spanish sources are hotly contested

On the timeline · around 15th-16th century CE · The Triple Alliance and Imperial ExpansionThe Triple Alliance and Imperial ExpansionHuman Sacrifice at the Templo Mayor: Belief and Disputed Scale14351440144514501455146014651470

Quick facts

Stated purpose
Repayment of a cosmic debt to the gods
Highest Spanish claims
50,000-100,000 per year (Las Casas)
Modern scholarly estimate
Hundreds to low thousands per year at major sites
Site
Templo Mayor, Tenochtitlan

What happened

Aztec religion held that the gods had sacrificed themselves to create the world and the sun, and that humans owed a debt of blood and hearts to keep the sun rising and the world from collapsing back into chaos. World History Encyclopedia describes the practice as neither unique to the Aztecs, since the Olmec and Maya practiced human sacrifice earlier, nor a simple invention of Spanish propaganda, since the Aztecs clearly took it to a larger scale than their predecessors. The specific death tolls come almost entirely from Spanish chroniclers writing after the conquest: figures cited by these sources range from Zumarraga's 20,000 a year to Gomara's 50,000 to Las Casas's claim of 50,000 to 100,000, numbers modern historians treat with real skepticism since exaggerating Aztec bloodshed served to justify Spanish conquest and colonial rule to audiences back in Europe. World History Encyclopedia's own assessment lands on hundreds to perhaps thousands of victims sacrificed annually at major religious sites, a figure still large by any standard but far below the highest Spanish claims.

Why it matters

This is one of the clearest cases where colonial-era sources had a direct interest in inflating a number, since a portrait of the Aztecs as uniquely and monstrously bloodthirsty helped justify Spain's war of conquest and its subsequent rule to European audiences. Treating the specific tolls as debated rather than fact does not erase that human sacrifice was real and central to Aztec state religion, but it separates the practice, well documented archaeologically, from figures that cannot be independently verified.

How we know

Archaeological excavation at the Templo Mayor since 1978 has recovered physical evidence of sacrifice, including skull deposits, which corroborates that the practice occurred at scale, but cannot independently confirm the specific annual death tolls claimed in Spanish colonial chronicles written for a European audience with reasons to inflate the horror of Aztec religion.

Sources

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Part of a timelineThe Aztec Empire25 events · From a wandering clan on a swampy island to the dominant power of Mesoamerica, and its end in a 93-day siegeView all →