Construction of dolmen Néolithique (≈ 4100 av. J.-C.)
Estimated period of construction of the monument.
16 août 1973
Historical Monument
Historical Monument 16 août 1973 (≈ 1973)
Registration by ministerial decree.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
Dolmen (Case H 51): entry by order of 16 August 1973
Key figures
Jean L'Helgouach - Archaeologist
Supposed to be a covered alley.
Yohann Sparfel - Archaeology Researcher
Contributed to his scientific inventory.
Yvan Pailler - Archaeologist
Co-author of the inventory of monuments.
Origin and history
The Dolmen de Cosquériou d'An Traon is an emblematic megalithic vestige of Neolithic, located in the commune of Bannalec, in Finistère. This monument, partially buried, is distinguished by its 3.20 m long Migmatite cover table, resting on three micaschist supports. Its trapezoidal chamber, only 40 cm high, suggests a funeral or ritual use, although some researchers, such as Jean L'Helgouach, evoke the hypothesis of a partially preserved covered aisle.
This dolmen has been part of the historical monuments since 16 August 1973 and illustrates Breton megalithic architecture. A local tradition combines the site with korrigans, mythical creatures of Breton folklore, reflecting its anchor in popular beliefs. Archaeological studies, such as those carried out by Yohann Sparfel and Yvan Pailler, highlight its importance in the inventory of prehistoric monuments of Finistère, while noting its approximate location near the site Cosqueriou Saint-Cado.
The structure, with its slab inclined towards the bedside, asks questions about its construction techniques and its exact function. The bibliographical references, including Georges Guénin's work on prehistoric folklore, highlight his dual interest: scientific for the understanding of Armomeric Neolithic, and cultural for the legends attached to him. Its state of conservation and limited accessibility make it a fragile but precious testimony of this time.
