Olèrdola’s Roman polygonal base survives beneath its medieval castle

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Key facts

• Olèrdola is about 50–60 km from Tarragona, inland from the coast, on a cliff above the Penedès. Spain’s official tourism site describes the Roman wall as about 145 m long, with a central gateway and four towers.
• The site has Ibero-Roman and medieval phases. The Counts of Barcelona later built the medieval castle over the earlier fortifications.
• The medieval additions use smaller stones bonded with mortar or cement and can resemble the older polygonal masonry.
• Several restoration campaigns have altered the complex, including a Generalitat-led project that reconstructed sections of the medieval wall to about three metres.
• The video argues that Olèrdola is the only 'Saturnian-style' cyclopean wall outside Italy. The cited archaeological sources do not establish that uniqueness.
• The video cites Alatri, Amelia and Cosa as comparisons. Their polygonal walls have different, site-specific dates and debated cultural attributions; they are not all uniformly dated to the fifth century BC.
• Vitruvius used 'Saturnian' for archaic polygonal masonry and invoked Saturn’s legendary age. That terminology does not establish a Bronze Age construction date.
• The video points out a small projection on one of the taller blocks; its function is not established.

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