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2 places to sift through. Narrow by kind, country, period or how firmly each one is established — contested and pseudoarchaeological claims are labelled here, never hidden.
🇵🇹 Portugal · Megalith
Early Neolithic – Chalcolithic (c.3500–2800 BCE) · Alentejo Megalithic (Almendres tradition)
Reguengos twin antas in shared mound — Anta 1 with 16 m corridor, 4 m polygonal chamber and schist plaques (3500 BCE).
🇵🇹 Portugal · Megalith
Late Neolithic – Chalcolithic (c.4000–3000 BCE) · Alentejo Megalithic
Squared (7 x 7 m) Alentejo cromlech of 55 small monoliths around 4 m phallic central menhir with cupules — moved for Alqueva dam.
