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Heritage classified

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Origin and history

Pors-an-Toullou and Ar-Verret are a group of six menhirs located in Porspoder, Finistère. These migmatic granite blocks, probably extracted on site near granitic chaos, were first identified by P. du Châtellier. Alfred Devoir, at the beginning of the 20th century, photographed and interpreted them as a cromlech, although their exact disposition remains debated. Three menhirs are still standing, between 0.60 m and 2.80 m high, while the other three are reversed.

The whole was classified as historical monuments by order of 27 December 1923. The blocks, of granite from Landunvez, suggest a local extraction, reinforcing the hypothesis of a neolithic origin related to funeral or ritual practices of the era. Their alignment and their varied size (from 0.50 m to 1 m thick) reflect techniques of size and transport controlled by the prehistoric communities of the region.

The location of the site, near granitic chaos that could have served as a quarry, and its early ranking in the 20th century underline its archaeological importance. Although initially considered a cromlech, the absence of a complete circle and the linear arrangement of the menhirs cast doubt on its exact function, typical of the questions surrounding the Breton megaliths.

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