HistoryNeolithic (c. 9500-8000 BCE)Southeastern Turkey (Upper Mesopotamia)low confidence

The center points of three circular enclosures at Göbekli Tepe form a near-perfect triangle whose sides each measure approximately 63 feet.

Notes on verification

Confirmed by peer-reviewed Cambridge Archaeological Journal study (Haklay & Gopher 2020) and corroborated by multiple independent science outlets. Minor rounding variance (19.25m ≈ 63.2ft) is negligible. [tier=unverified indep_score=0.3 clusters=4 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]

Sources