History

The Grand Menhir Brisé was quarried from an orthogneiss granite outcrop approximately 4 km from its present location. The transport of a single block of this mass — before the wheel, before draught animals capable of such loads, in a landscape of soft coastal ground — required an estimated 3,000–4,000 people working simultaneously with log rollers, wooden sledges, and rope: the largest single transport operation documented in European prehistory. The stone was erected around 4000 BC, apparently standing for only a few centuries before falling — possibly toppled by an earthquake — and breaking into its four present pieces.

The most extraordinary chapter in Locmariaquer’s history was revealed in 1983 by Brittany archaeologists: the capstones of the Table des Marchands passage tomb here, the Gavrinis passage tomb on its island in the Gulf of Morbihan, and the Er Grah tumulus nearby are all fragments of a single stone — the Grand Menhir Brisé itself. The enormous menhir was deliberately broken sometime around 3500–3000 BC, and its fragments transported and placed as capstones of three separate megalithic monuments across the Gulf of Morbihan. The upper surface of each fragment carries carved imagery: the Gavrinis capstone bears cattle figures and a crook, while the Table des Marchands capstone shows a large bovid and chevrons — images carved on the menhir before it was broken. This deliberate redistribution of the broken stone — ritually transforming one enormous monument into parts of three others — is one of the most extraordinary acts documented in European prehistory.