Aztec and Maya Food Storage Systems
What it is
The food storage systems of Mesoamerica: the granaries, storehouses, and storage vessels that provisioned the great cities of the Aztec empire (feeding the 200,000-plus inhabitants of Tenochtitlan) and the Maya cities of the lowlands. These systems combined household and state storage, drew on maize as the keystone crop, and — in the Maya case — pose one of the more intriguing unsolved puzzles in the archaeology of storage.
The science
Mesoamerican storage faced a difficult enemy: the warm, often humid climate of the tropics and subtropics, far less forgiving to stored grain than arid Egypt. Maize had to be kept dry enough to prevent mold and the sprouting of the kernels, and protected from weevils and rodents. Drying the maize thoroughly on the cob, storing it in ventilated above-ground granaries, and in some cases lining underground pits with lime plaster (which is alkaline, moisture-resisting, and mildly antimicrobial) were the strategies for holding the staple stable through the year. Lime is doubly significant in Mesoamerica because nixtamalization — soaking maize in an alkaline lime solution — was already central to processing it, so lime was a familiar, available material.
Reference notes
Cross-link to The Inca Qollqa and Andean Freeze-Drying (the neighboring Andean storage world), to The Nile Flood Cycle and Chinese state granaries (convergent reserve and tribute systems), and to maize, nixtamalization, and lime ingredient/technique entries. A strong entry on tropical-climate storage challenges and on the archaeology of absence (the Maya storage puzzle).
How its done
The Aztecs stored maize and other staples in large granaries — the cuezcomatl, a substantial bin (built of woven materials plastered with clay, or of other materials) for holding shelled or cob maize — at the household and community level, and in great state storehouses at the imperial center. Tenochtitlan's central storehouse complex, the petlacalco, held the tribute grain and goods that flowed in from across the empire, administered by a high steward (the petlacalcatl). The collection and storage of tribute was managed by officials, the calpixque (singular calpixqui), who oversaw the tribute provinces and channeled their goods into the storehouses. Storage vessels ranged from ceramic jars to gourds to woven-fiber containers, and lime-plastered underground pits were used in some regions.
When to use
Centralized tribute storage suits an imperial system that taxes its provinces in kind and must provision a huge non-farming capital, a standing apparatus of officials, and the population in times of shortage. Household granaries like the cuezcomatl suit the family or community keeping its own annual maize supply.
What goes wrong
In the Mesoamerican climate, the chief failures were mold and rot from inadequate drying or humidity, insect infestation, and rodents — all harder to defeat than in dry climates. Crop failures, frosts, and droughts (such as the great famines recorded in Aztec history) could exhaust reserves and bring catastrophe, and the response — opening the granaries, distributing stored maize — was both relief policy and a test of the state's competence and legitimacy.
Regional variations
The Maya present a genuine archaeological puzzle: their cities clearly fed large populations, yet obvious centralized granaries are scarce in the record, raising the question of how the Maya stored their maize. One long-debated possibility is the chultun — bottle-shaped chambers cut into the bedrock. In some regions (notably the Puuc hills) chultuns clearly served as water cisterns, but elsewhere their function is contested, and some scholars have argued certain chultuns, or perishable above-ground structures that left little trace, handled food storage. The likeliest answer is that much Maya storage was decentralized, household-based, and built of perishable materials — which is exactly why it is hard to find. Both the Aztec and Maya systems, like Egypt and the Andes, reflect the broader pattern of states maintaining reserves against the certainty of bad years, though the precise scale and doctrine of those reserves is better documented for some societies than others.
Cultural context
Maize was not merely food in Mesoamerica but a sacred substance — humans, in Maya cosmology, were fashioned from maize dough. Storing maize was therefore freighted with cultural and religious meaning, and the granary and the tribute storehouse sat at the intersection of sustenance, sacred staple, taxation, and state power. The calpixqui collecting tribute maize was operating a machine that was simultaneously economic, political, and cosmological.