The greatest complex of megalithic monuments in prehistoric Europe is at Carnac on the Gulf of Morbihan in southern Brittany.
The monuments were constructed in the Neolithic and Early Bronze Age, from around 4500 to 2000 BC, and include the long mounds of Er Grah and Le Manio, each of which contain several burial chambers, classic megalithic graves decorated with geometric designs at La Table des Marchands, Gavrinis and Kercado, and the great standing stone of Le Grand Menhir BrisÈ, now lying on the ground broken into four pieces.
The alignments of Le Menec, Kermario and Kerlescant comprise a grand total of 2,934 standing stones aligned over a total distance of more than 2 miles (4 km). The purpose of such alignments is unknown, but an astronomical significance has been suggested.
