Carnac stones

The Carnac stones (Breton: Steudadoù Karnag) are an exceptionally dense collection of megalithic sites near the south coast of Brittany in northwestern France, consisting of stone alignments (rows), dolmens (stone tombs), tumuli (burial mounds) and single menhirs. More than 3,000 prehistoric standing stones were hewn from local granite and erected by the pre-Celtic people of Brittany and form the largest such collection in the world. Most of the stones are within the Breton municipality of Carnac, but some to the east are within neighboring La Trinité-sur-Mer. The stones were erected at some stage during the Neolithic period, probably around 3300 BC, but some may date to as early as 4500 BC.

Although the stones date from 4500–3300 BC, modern beliefs associated them with 1st century AD Roman and later Christian occupations. A Christian legend associated with the stones held that they were pagan soldiers in pursuit of Pope Cornelius when he turned them to stone. Brittany has its own local versions of the Arthurian cycle. Local tradition similarly claims that the reason they stand in such perfectly straight lines is that they are a Roman legion turned to stone by Merlin the Wizard.

In recent centuries, many of the sites have been neglected, with reports of dolmens being used as sheep shelters, chicken sheds or even ovens. Even more commonly, stones have been removed to make way for roads, or as building materials. The continuing management of the sites remains a controversial topic.

According to Neil Oliver's BBC documentary A History of Ancient Britain, the alignments would have been built by hunter-gatherer people ("These weren't erected by Neolithic farmers, but by Mesolithic hunters"). That would place them in a different category from Stonehenge in England, which has been claimed to be the work of Early European Farmers. The question of which people Carnac stones are to be attributed to is still debated.

There are three major groups of stone rows – Ménec, Kermario and Kerlescan. They may have once formed a single group but have been split up as stones were removed for other purposes. Together they trace a contour line, around 20 meters above sea level.

The standing stones are made of weathered granite from local outcroppings that once extensively covered the area.

Eleven converging rows of menhirs stretching for 1,165 by 100 metres (3,822 by 328 feet). There are what Alexander Thom considered to be the remains of stone circles at either end. According to the tourist office there is a "cromlech containing 71 stone blocks" at the western end and a very ruined cromlech at the eastern end. The largest stones, around 4 metres (13 feet) high, are at the wider, western end; the stones then become as small as 0.6 metres (2 feet 0 inches) high along the length of the alignment before growing in height again toward the extreme eastern end.

This fan-like layout recurs a little further along to the east in the Kermario (House of the Dead) alignment. It consists of 1029 stones in ten columns, about 1,300 m (4,300 ft) in length.^{[citation needed]} A stone circle to the east end, where the stones are shorter, was revealed by aerial photography.