The circular stone platform and a monolithic sculpture found at the Campo Viejo site have been dated to the Early Classic period, between A.D. 200 and 600.
Notes on verification
Multiple independent, reputable outlets (ScienceAlert, France24/AFP, Smithsonian Magazine, GMA News, Manila Times, Türkiye Today, Newsbytes) corroborate the dating provided by INAH archaeologists for the circular platform and monolith at Campo Viejo. [tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Unusual Platform and Monolith Found in Eastern Mexico (seed:history_and_archaeology)
- This Ancient Monolith That Archaeologists Unearthed in Mexico May ... (seed:history_and_archaeology)
- https://www.sciencealert.com/ancient-ruins-found-in-mexico-have-never-before-seen-features (corroboration)
- https://www.france24.com/en/americas/20260620-mexican-archaeologists-unearth-ancient-ruins-with-unique-mayan-features (corroboration)