Timeline

Heritage classified

Key figures

Origin and history

The dolmen of the Torche tip, also known as the tumulus of Beg an Dorchenn ("point of the cushion" in Breton), is located on a peninsula of Plomeur, in the Finistère. This exceptional megalithic site includes two superimposed monuments: a corridor dolmen dated from the Middle Neolithic (ca. 4500–4090 BC) and a covered alley of the Final Neolithic (ca. 2884–2500 BC). Both structures are buried in superimposed cairns, backed by a natural projection of granulite. The dolmen, of "Carnacean and Southern" type, has a compartmented chamber, while the covered gangway, oriented differently, rests on the eastern slope of the lower cairn.

The site reveals a human occupation as early as the final Mesolithic (ca. 5640–5550 B.C.), attested by a shell cluster under the tumulus. The excavations, notably those of Pierre-Roland Giot in 1946, revealed human bones in the two monuments, suggesting distinct funeral practices: dispersal of bones in the dolmen and complete burials in the covered driveway. Archaeological furniture (silex, pottery, gold trim) and carbon 14 dating have confirmed the remarkable seniority of the site, among the oldest dolmens in Europe.

The peninsula, damaged by military constructions (the 19th century coast guard post, German casemates during the Second World War), was classified as a historic monument in 1960. Since 1989 it has been part of the classified natural site of Audierne Bay. The Dolmen de Beg an Dorchenn is considered a "radiation center" for local megalithic builders, especially due to the alignment of 600 to 700 nearby menhirs towards its top. The objects discovered are exhibited at the Museum of prehistory of Finistrian Penmarc.

The tumulus architecture, combining artificial cairns and natural relief, illustrates an advanced technical mastery for the period. The differences between the two monuments (orientation, trimming, treatment of the deceased) reflect a change in beliefs and social practices between the middle and final Neolithic. The site thus offers a unique testimony on funeral rituals, spatial organization and cultural exchanges in prehistoric Brittany.

The excavations also revealed a mesolithic shell cluster under the lower cairn, indicating an occupation prior to the construction of the monuments. This level, consisting of ash and shellfish residues, suggests intensive exploitation of marine resources by local populations before the megalithic era. The superimposition of the cairns and the reuse of the site at different times underline its symbolic and strategic importance over several millennia.

Pierre-Roland Giot stressed the exceptional interest of tumulus in the chronology of Breton civilizations, notably thanks to the early dates of the bones. The site, together with other neighbouring tumulus such as that of the Rosmeur in Penmarc The damage suffered in the 20th century led to restoration and protection campaigns, making the Torch's tip a major place for the study of Armo-American megalithism.

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