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The Carnac Alignments

The Carnac Alignments

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The Neolithic Revolution · PREHISTORY

🗿 Carnac: the stone army of the Neolithic

🌍 A unique site in the world

Located in the Morbihan region of Brittany, the site of Carnac contains the largest concentration of megaliths in the world. More than 3,000 menhirs stand there, stretching over more than 4 kilometers.

These stones were not placed randomly: they form impressive parallel lines known as alignments.

Carnac alignments
Panoramic view of the Ménec alignments, the most famous site in Carnac.

🕰️ Who built them and when?

Contrary to popular belief, these stones were not erected by the Gauls (and certainly not by Obelix!).

The alignments were built during the Neolithic, between 4500 and 3000 BCE, long before the arrival of the Celts in France. They were constructed by sedentary farming communities who mobilized a massive workforce to move and raise these local granite blocks.

❓ What was their purpose?

This remains one of the greatest mysteries of French prehistory. Several theories coexist:

  • An astronomical calendar: The lines may align with the sunrise or sunset during solstices, serving as an observation tool for agriculture
  • A religious sanctuary: A place of worship dedicated to ancestors or deities
  • A symbol of power: A way for clans to mark their territory and display their strength

🏰 Legends and folklore

For centuries, in the absence of scientific explanations, local people created legends:

  • The most famous claims they are a Roman army turned to stone by Saint Cornely to protect Christians
  • Another says the stones go to drink in the sea once a year, on Christmas night

🛡️ Preserving this treasure

Today, the site is protected and is a candidate for UNESCO World Heritage status. The fragility of the soil and the stones requires strict management to ensure this testimony of human ingenuity endures for future generations.

🧠 Key takeaways

  • 3,000 menhirs over 4 km
  • Built during the Neolithic (long before the Gauls)
  • Likely a sacred, social, or astronomical function

📸 Image credits

  • Carnac alignments — JLPC, CC BY-SA 3.0, via Wikimedia Commons