Alleged alignments Vers 4500 av. J.-C. (≈ 100 av. J.-C.)
Neolithic period, on land
24 juillet 2023
Registration for historical monuments
Registration for historical monuments 24 juillet 2023 (≈ 2023)
With Men Letionec and Goémorent
2025
UNESCO classification
UNESCO classification 2025 (≈ 2025)
Integration with the megaliths of Carnac
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
The alignment of Men Letionec, as well as the base soil of the plots BP 98 to 113 and BP 118 to 120, the alignments of Kerpenhir on the estran and the menhir of the Goemor on the estran. Part of this set is located on the public maritime domain, not cadastred. The terrestrial part of this set appears in the cadastre of the commune section BP parcels No 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 118, 119 and 120, shown on the plan attached to the decree: inscription by order of 24 July 2023
Key figures
Serge Cassen - Archaeologist
Geophysical studies of steles (2010, 2015)
Origin and history
The Kerpenhir alignments are an exceptional megalithic site located on the estran of the Kerpenhir tip, in Locmariaquer (Morbihan). Composed of two groups of granite steles, they extend over hundreds of meters but are only accessible at low tide, the rest of the time being covered by the ocean. The 135 steles of the north group (Kerpenhir 1) and the 76 of the south group (Kerpenhir 2) were probably erected on land 6,500 years ago, before the rise of the waters.
The site was listed as a historical monument on 24 July 2023, along with Men Letionec and Goémorent's neighbouring menhirs. Since 2025, it has been part of the UNESCO World Heritage site "Megalithes of Carnac and the shores of Morbihan". The steles, which are now buried and covered with seaweeds, bear witness to a neolithic occupation in a zone now coastal but formerly terrestrial.
Archaeological research, such as that carried out by Serge Cassen in 2010 and 2015, has enabled the study of these submerged remains through geophysical prospecting. Their present position, between -8 m and sea level, illustrates the evolution of the Breton coast since the Neolithic. The site remains fragile, exposed to tides and erosion, while offering a rare testimony of funeral or ritual practices of that time.
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