Cairn et Dolmen de l’Île Longue
MonumentHidden Treasure
Cairn et Dolmen de l’Île Longue, located in Larmor-Baden (Département 56), is a historic monument. The monument is currently closed to visitors.
Key facts
- Type
- autre
- Location
- Larmor-Baden, Département 56, Bretagne
- Visit
- Closed to visitors
- GPS
- 47.5674, -2.9082
- Mérimée Reference
- PA56000126
Nestling on Ile Longue in the Gulf of Morbihan, this Neolithic cairn contains a corridor dolmen of rare complexity, a striking vestige of a civilisation that disappeared over 5,000 years ago.
History
In the heart of the Gulf of Morbihan, the inland sea that the Bretons call the "little sea", Ile Longue conceals one of the most enigmatic megalithic complexes on the Armorican coast. The cairn on Ile Longue is not just a pile of stones: it is a well-thought-out funerary architecture, built stone by stone by Neolithic populations whose mastery of the land and the symbolic have nothing to envy of the great contemporary Mediterranean civilisations. What sets this monument apart from so many other Breton dolmens is first and foremost its island location. Accessible only by boat from Larmor-Baden or Port-Blanc, Ile Longue requires a crossing that is as much a pilgrimage as a walk. The Gulf of Morbihan, dotted with some forty islands and islets, is home to a density of megaliths unrivalled in Europe: Ile Longue is one of the most moving landmarks in this sacred archipelago. The cairn itself is a trapezoidal mass of carefully joined dry stone, covering and protecting the inner dolmenic structure. Visitors entering the access corridor immediately feel the coherence of the space: a progression towards the sepulchral chamber reminiscent of other large cairns in the Gulf, such as Gavrinis, just a stone's throw away. The special acoustics of the chamber, the play of low-angled light on the orthostats, the sensation of being surrounded by thousands of years of history - all combine to create a visit that is as much about archaeology as it is about meditation. The natural setting further enhances the impression. The island's shores, covered in moorland and tamarind trees, offer panoramic views of the surrounding islands and the Rhuys peninsula. At low tide, glistening mudflats reveal the shifting geography of this gulf, where the sea itself seems reluctant to define its boundaries. The light of the Morbihan, particularly golden in the late afternoon, makes this an exceptional photographic subject.
Architecture
The Île Longue cairn belongs to the family of corridor dolmen cairns, the dominant architectural type in the Gulf of Morbihan during the Middle Neolithic period. The cairn itself - the mass of stone that envelops and protects the internal structure - adopts a generally elongated, even trapezoidal plan, characteristic of Armorican constructions from this period. The outer walls, made of local granite blocks carefully dry-fitted together, form an outline that is still legible despite the subsidence and plant intrusions of time. Inside the cairn, the dolmen itself consists of an access corridor - probably facing east or south-east, in line with practices observed on contemporary monuments in the region - leading to a polygonal sepulchral chamber covered with large stone slabs. The orthostats, the vertical blocks that form the walls of the corridor and chamber, are over a metre high in places. The slab covering the chamber, if it is still in place, is the most impressive architectural feature of the structure, testifying to a site logistics that contemporary archaeology is only just beginning to quantify precisely. The materials used - local arenised granite and schist - are typical of the geology of the Morbihan archipelago. The absence of mortar and the mastery of dry fixtures reveal an empirical knowledge of the mechanics of structures that compels admiration. Compared with the large neighbouring cairns (Gavrinis, Er-Grah, Table des Marchands), Ile Longue offers a more austere, less ornate version, but with a preserved architectural coherence that gives it a special authenticity.
Related Figures
Populations néolithiques armoricaines (bâtisseurs anonymes, vers 4500-3500 av. J.-C.)Membres de la Société Polymathique du Morbihan (érudits du XIXe siècle, premiers descripteurs du monument)Zacharie Le Rouzic (archéologue carnacéen, figure majeure de l'inventaire mégalithique morbihannais, XIXe-XXe s.)James Miln (archéologue écossais, pionnier des fouilles mégalithiques du Morbihan, XIXe s.)René Galles (ingénieur et archéologue vannetais, l'un des premiers à documenter les dolmens du golfe au XIXe s.)
Tags
Nearby castles
Frequently Asked Questions
Where is Cairn et Dolmen de l’Île Longue located?
Cairn et Dolmen de l’Île Longue is located in Larmor-Baden, Département 56 department, Bretagne region, France.
Is Cairn et Dolmen de l’Île Longue open to visitors?
Cairn et Dolmen de l’Île Longue is currently closed to visitors.
