"Monte Sierpe in Peru contains approximately 5,200 holes that may have supported Indigenous accounting and exchange and were later used by the Inca."
Archaeological research published online in Antiquity in November 2025 documents approximately 5,200 deliberately arranged holes at Monte Sierpe. The authors propose an Indigenous accounting and exchange function, possibly originating before Inca rule and subsequently serving Inca administration, making the site a useful example of physical information-management infrastructure.
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