Dolmen à galerie dit Er-Roh
MonumentHidden Treasure
Dolmen à galerie dit Er-Roh, located in Sarzeau (Département 56), is a historic monument. The monument is currently closed to visitors.
Key facts
- Type
- autre
- Location
- Sarzeau, Département 56, Bretagne
- Visit
- Closed to visitors
- GPS
- 47.5426, -2.8101
- Mérimée Reference
- PA00091729
A Neolithic vestige buried on the Rhuys peninsula, the Er-Roh gallery dolmen reveals a burial chamber over 5,000 years old, a silent witness to the megalithic rites that shaped wild Brittany.
History
Nestling on the Rhuys peninsula, an area of moorland and shores bordering the Gulf of Morbihan, the Er-Roh gallery dolmen is one of the most remarkable megalithic concentrations in Europe. Its Breton name - "Er Roh", which can evoke an eminence or a promontory - betrays the attachment of the local population to this monument, which is part of a landscape that Neolithic farmers had deeply anthropised. What makes Er-Roh unique among the many dolmens in Morbihan is that it belongs to the family of covered gallery aisles, an elaborate type of funerary architecture that requires a social organisation capable of mobilising a considerable workforce and planning work sites over several generations. The chamber, delimited by large orthostats made of local granite, was connected to the outside world by a carefully oriented access corridor, probably linked to the solar or lunar cycles so dear to the Neolithic communities of western Armorican. To visit Er-Roh is to agree to slow down. The monument, discreet in the eyes of the hurried walker, gradually reveals its austere and majestic geometry: the roof slabs balanced on their supports bear witness to a mastery of lifting techniques that continues to puzzle archaeologists. The site's proximity to the Gulf of Morbihan and the wild coastline of the peninsula give the visit a timeless atmosphere. The surrounding environment - sparse vegetation, low-angled light at the end of the afternoon, the iodised scent of the Atlantic - amplifies the emotion of the heritage. Er-Roh is not a spectacular monument in the tourist sense of the word; it's a place to contemplate and connect with the first farmers who, over five millennia ago, built their collective memory here in stone.
Architecture
Er-Roh belongs to the category of gallery dolmens, or covered walkways, which constitute one of the most advanced forms of Armorican Neolithic funerary architecture. The construction principle is based on the erection of orthostats - large vertical slabs of granite - arranged in two parallel rows to form the walls of a corridor leading to a main burial chamber. Covering slabs laid horizontally on these uprights provide the roof for the whole structure, creating a protected interior space that can be several metres long. Granite, the dominant rock in the Armorican geology, is the almost exclusive material used for this type of construction in Morbihan. Its hardness and resistance to the elements partly explain the remarkable longevity of these monuments over five millennia. The blocks used, sometimes weighing several tonnes, were extracted from nearby deposits, then transported and set in place using techniques combining earth ramps, wooden levers and collective human or animal traction. The precision with which the blocks were assembled, without any binding agents, bears witness to the architectural experience accumulated by generations of specialised craftsmen. The orientation of the access corridor is a fundamental technical element: in most Morbihan dolmens, it is not random but correlated with astronomical phenomena, sunrise or sunset at solstices or equinoxes. This cosmological dimension reinforces the hypothesis that the architecture was conceived not just as a sepulchre, but as an interface between the world of the living and that of the dead, between human time and cosmic time.
Related Figures
James Miln — archéologue écossais pionnier des fouilles mégalithiques du Morbihan au XIXe siècleZacharie Le Rouzic — archéologue carnetois, inventorieur des mégalithes du golfe du MorbihanProsper Mérimée — inspecteur général des Monuments Historiques, promoteur de la protection des mégalithes bretonsRené Galles — antiquaire vannetais du XIXe siècle, auteur de relevés des monuments de la presqu'île de RhuysCommunautés néolithiques du Morbihan — bâtisseurs anonymes du monument entre 4500 et 2500 avant J.-C.
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Frequently Asked Questions
Where is Dolmen à galerie dit Er-Roh located?
Dolmen à galerie dit Er-Roh is located in Sarzeau, Département 56 department, Bretagne region, France.
Is Dolmen à galerie dit Er-Roh open to visitors?
Dolmen à galerie dit Er-Roh is currently closed to visitors.