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Origin and history

The Narbon alignment, also known as Man Liesse's alignment, is a megalithic ensemble located in Erdeven, Morbihan. This site, dated Neolithic, is located 400 metres northwest of the Narbon Mill, on a granite outcrop. Today it is largely ruined, with about ten blocks lying and only two or three menhirs still standing, measuring about 1.80 meters high. Several stones seem integrated into the walls delimiting the plot.

The monument was listed as historical monuments by order of 24 July 2023. Since 2025, it has been part of the site of the megaliths of Carnac and the shores of Morbihan, a UNESCO World Heritage site. This site covers plots ZR 56 and ZR 57 of the Erdeven cadastre, as specified in the protection order.

The alignment of Narbon illustrates the importance of megalithic constructions in the Breton region during the Neolithic period. These monuments, often linked to funeral or ritual practices, bear witness to the social organization and beliefs of the communities of the time. Their preservation allows us to study techniques of construction and occupation of territories by prehistoric populations.

Available sources, including Philippe Gouézin's work in Les megalithes du Morbihan littoral (2007), highlight the archaeological richness of this area. The site is located at the approximate address of the 16 Impasse du Moulin in Erdeven, although the accuracy of this location is considered mediocre (level 5 of 10).

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