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Heritage classified

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Origin and history

Agot Island is an uninhabited and mainly rocky island located 600 metres off Saint-Briac-sur-Mer in Ille-et-Vilaine. It is approximately 600 metres long and 270 metres wide, and is known for its protohistoric sites, including a Gallic habitat dating back to the late late Latenian period. This archaeological heritage led to its inscription as a historical monument by order of 13 June 1975.

In the 1960s, the island served as a framework for survival courses organized by the Scouts of France. Participants were asked to find fresh water sources and feed on local resources such as skates and bigorneaux, although this practice has yet to be confirmed by reliable sources.

Agot Island is now protected for its archaeological importance. Its isolation and rocky relief make it a preserved site, offering a rare testimony of human occupations during the Protohistory in Brittany. The precise location of the island is assessed as satisfactory, with an Insee code associated with the commune of Saint-Briac-sur-Mer (35256).

The site is not open to the visit on a permanent basis, and its access remains limited, thus preserving its integrity. The available data come mainly from sources such as Wikipedia and Monumentum, as well as from the archives of the Merimée database.

The listing of the island as a historical monument specifically covers the protohistoric sites it contains, identified under Cadastre A 1. This legal protection is intended to preserve archaeological remains and to limit disturbance to the site.

Agot Island illustrates the ancient human occupation in Brittany, with material traces of Gaulish life. His study contributes to an understanding of the lifestyles and strategies of protohistoric populations in this coastal region.

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