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Heritage classified

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Origin and history

The menhir de Caëlonan, also called Caillouan, is an iconic megalithic monument located in Plesidy, in the Côtes-d'Armor department in Brittany. Dating from the Neolithic, it consists of granite and is distinguished by its cylindrical shape, with a quadrangular base and a rounded top. With a height of 8 metres, a width of 2.70 metres and a thickness of 1.70 metres, it is a remarkable example of the megalithic architecture of this period.

The menhir has been classified as historic monuments since 1889, highlighting its heritage importance. Nearby, 98 metres south, is a dolmen now buried, of which only the granite cover table, almost circular (2.60 metres long by 2.30 metres wide), is still visible. This dolmen was once based on three orthostats, observable until the early 20th century.

Both structures illustrate the ingenuity of neolithic communities in the construction of funeral or memorial monuments. Their presence in Plesidy bears witness to the ancient occupation of this Breton territory, marked by a strong megalithic tradition. Research, such as that conducted by Loïc Langouët in Les megalithes de l'arrondissement de Guingamp (2006), helps document these remains and their historical context.

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