Dolmen dit Le Tombeau des Martyrs, à Ros
MonumentHidden Treasure
Dolmen dit Le Tombeau des Martyrs, à Ros, located in Nivillac (Département 56), is a historic monument. The monument is currently closed to visitors.
Key facts
- Type
- autre
- Location
- Nivillac, Département 56, Bretagne
- Visit
- Closed to visitors
- GPS
- 47.5661, -2.2730
- Mérimée Reference
- PA00091464
Set in the Breton countryside around Nivillac, the Tombeau des Martyrs (Martyrs' Tomb) is a Neolithic dolmen steeped in mystery, whose imposing granite blocks bear witness to a funerary art form dating back over 5,000 years.
History
In the heart of deep Morbihan, a few leagues from the Vilaine marshes, stands the dolmen known as "Le Tombeau des Martyrs", one of the most discreet and bewitching megalithic testimonies of southern Brittany. Far from the crowds of the great Carnac alignments, this monument offers an intimate and almost solitary encounter with prehistory, in a natural setting that the centuries have barely disturbed. The site's uniqueness stems from its Christianised place name - "Martyrs' Tomb" - which conceals a much older reality. This semantic shift, common in medieval Brittany, reveals how rural communities reinterpreted these colossal stones through the prism of their faith, transforming a Neolithic collective burial ground into a memorial to saints or victims of an indeterminate period. This dual interpretation, prehistoric and legendary, gives the site a unique atmosphere. Visiting the site is like coming face to face with matter and time. The granite slabs, with their patina of golden lichen and dark moss, seem to absorb the low-angled light of autumn mornings. Here, we sense the excessiveness of the Neolithic gesture: moving, erecting and balancing blocks weighing several tonnes with no tools other than collective strength and an ingenuity that archaeologists are still struggling to fully reconstruct. Nivillac's discreet, wooded setting reinforces this sense of timeless isolation. The paths leading to the dolmen run through dense hedgerows and wet meadows typical of the Redon region, offering heritage walkers a stroll that's as rejuvenating as it is instructive. The monument is freely accessible, making it possible to visit at dawn or dusk, when the light dramatises the silhouette of the megaliths with particular intensity.
Architecture
The Tombeau des Martyrs belongs to the large family of simple dolmens or single-chamber dolmens, one of the most widespread architectural formulae in southern Morbihan. Its structure is based on a tried-and-tested construction principle: several orthostats (vertical slabs set in the ground) form the walls of a rectangular or slightly trapezoidal burial chamber, on which rest one or more horizontal covering tables - the bedside slabs - forming the roof of the monument. The materials used are local granite, a rock that is abundant in the Armorican subsoil and particularly resistant to erosion, which explains the remarkable longevity of these buildings. The blocks have a naturally rough surface, colonised on their exposed sides by grey and orange lichens forming crusts characteristic of Breton megalithic stones. The usual dimensions for a dolmen of this type in the Vilaine area put the chamber at between 3 and 6 metres long and 1.5 to 2.5 metres wide, with a slab height of between 1.2 and 2 metres. It is likely that the monument was originally covered by a mound of earth and small blocks of stone, of which all that remains today is the megalithic skeleton exposed by centuries of erosion and agricultural activity. This exposure gives the dolmens their distinctive silhouette, similar to a giant table set in the vegetation, although this appearance does not correspond to their original appearance, where only the access to the chamber was cut into the mass of the tumulus.
Related Figures
Constructeurs néolithiques anonymes (vers 4000-3000 av. J.-C.) — bâtisseurs collectifs du dolmenCommunautés agricoles armoricaines du Néolithique moyen — utilisateurs rituels et funéraires du siteProsper Mérimée (1803-1870) — inspecteur général des Monuments Historiques, promoteur de la protection des mégalithes bretonsZacharie Le Rouzic (1864-1939) — archéologue carnacéen, inventeur et documentateur de nombreux mégalithes morbihannaisAbbé Mahé (1769-1842) — pionnier de l'inventaire des monuments mégalithiques du Morbihan au XIXe siècle
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Frequently Asked Questions
Where is Dolmen dit Le Tombeau des Martyrs, à Ros located?
Dolmen dit Le Tombeau des Martyrs, à Ros is located in Nivillac, Département 56 department, Bretagne region, France.
Is Dolmen dit Le Tombeau des Martyrs, à Ros open to visitors?
Dolmen dit Le Tombeau des Martyrs, à Ros is currently closed to visitors.