Newly discovered standing stones in France shed light on the ancient megalith builders

Over 6,000 years ago, farmers in Brittany, western France, erected around 3,000 stones in long rows, stretching for more than 4km across what is today the town of Carnac. 

These builders made sure to place shorter stones at the east side of the arrangement and taller ones to the west, some standing nearly 4m tall, and erected others in the shape of semicircular and rectangular enclosures. 

They also built hearths beside the stones’ irregular granite forms, perhaps for cooking or simply for light, and buried their dead beneath mounds of earth and megalithic tombs across the sacred landscape.

But what did Carnac’s mysterious standing stones mean to these early builders? Were they a way of monitoring the movements of the sun and moon? A colossal calendar? Or were they the petrified bodies of soldiers, as one 17th-century legend relates. For archaeologists trying to understand the site, any new piece of the puzzle could help provide an answer.

This mystery has long endured, partly because there has been little excavation at Carnac compared with most archaeological sites of this significance. Individuals conducted sporadic excavations before the 20th century; and even then, except for archaeological investigations from the 1920s to the early 1940s, the aim has mainly been a place to preserve and protect. 

Its global significance was cemented in 2025 when the Megaliths of Carnac and of the shores of Morbihan were inscribed on Unesco’s World Heritage list.