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Heritage classified

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Origin and history

The Menhir de Lehan is an iconic megalithic monument located in the municipality of Treffiagat, Finistère. This granite block, about 5 metres high, is distinguished by its shape evoking a shield, with a flat eastern face and a concave western face. Its current location in a marsh illustrates the local geological transformations: the rise of the sea level blocked the flow of a nearby stream, creating this wetland after its erection.

Ranked as historical monuments by order of 6 March 1923, Lehan's menhir testifies to the importance of megalithic sites in Brittany. Its protection includes a plot of land of 2 metres around the monument (cadastre P 1078). The description of its location, although considered a priori satisfactory (note 6/10), remains approximate, with an address referenced at 5374 Chemin des Dunes.

Available sources, including Wikipedia and Monumentum, highlight its membership of the Finistrian megalithic heritage. The site, although not explicitly described as accessible to the public, is part of a wider network of prehistoric Breton monuments, studied by Aubrey Burl in his Guide des dolmens et menhirs brétons (1987).

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