Carnac is arguably Europe’s most visually remarkable megalithic site. It is situated near the town of the same name in Brittany. Many will have seen images of the rows of standing stones there, often unaware that there are four main sets of them close to Carnac as well as cromlechs and solitary menhirs, including the largest, Le Grand Menhir Brisé, now broken, but originally 70 ft long and weighing around 300 tons. In their 1978 book [1771.180], Alexander Thom and his son, Archie, in the conclusion to their book, in spite of their extensive studies of the stone rows, agreed that “we do not know what these were for” and although various theories have been proposed since; we still don’t.
I always thought that the stone rows at Carnac were unique, until I saw an image of a similar arrangement of stones at Vibhuthihalli at Karnataka in India. It may be pure coincidence, but the similar sounds of Carnac and Karnataka is remarkable(f)(g).
Jean Markale presumed that there was a connection between Atlantis and the megalithic standing stones of Carnac in Brittany. Rather than solve these two mysteries, his book, Carnac et L’enigme de L’atlantide (Carnac and the Enigma of Atlantis)  would seem to deepen them.>Paul Johnson offered a review of Markale’s book in 1987(j).<
Helmut Tributsch suggested that the island of Gavrinis near Carnac in Brittany had been the capital of this Atlantean civilisation(h). He dated the destruction of Atlantis to 2200 BC, a date also favoured by Anton Mifsud.
Hans-Pény Hirmenech expressed the wild idea that the rows of standing stones at Carnac marked the tombs of Atlantean soldiers who fought in the Trojan War! Wikipedia notes that “A Christian myth associated with the stones held that they were pagan soldiers in pursuit of Pope Cornelius when he turned them to stone.”(a)
Hank Harrison supports the idea of a megalithic Atlantis with its centre of power, probably located in the Morbihan area of Brittany.
Based on the picture and the data present, Schulz Paulsson believes that the megaliths were first constructed by dwellers of northwest France during the second half of the fifth millennium BC.”(b) Mike Parker Pearson, Stonehenge’s leading authority, has endorsed this idea of a French origin for megalith building(c).
Neil L. Thomas in a 2021 paper(d) has studied three sites near Carnac that hold long rows of standing stones whose purpose was uncertain. Thomas concluded that they had a calendrical function relating to the sun and moon. I cannot help wondering why such extensive and labour-intensive structures were needed to achieve this relatively simple objective.
R. Cedric Leonard has published an interesting overview of the Carnac mystery, suggesting that the erection of the three rows of standing stones may have been originally connected. He further proposes that the builders of the monuments were possibly a Cro-Magnon people, namely, the Azilians.
In 2017, Arthur Faram published a short paper with the interesting title of The Carnac Stones Decoded. Frankly, I could not understand his theory at all(i).
(h) Die gläsernen Türme von Atlantis: Erinnerungen an Megalith-EuropaDie gläsernen Türme von Atlantis: Erinnerungen an Megalith-EuropaDie gläsernen Türme von Atlantis: Erinnerungen an Megalith-Europa – Helmut Tributsch (archive.org)(German) *
The Megalith Builders, who date mainly from the Neolithic Period, are frequently identified with Plato’s Atlanteans. Their remarkable structures were built between the middle of the fifth and second millennia B.C., a period that is compatible with the final days of Atlantis according to Plato. The building of megalithic structures in Western Europe appears to have ended just before the beginning of the Bronze Age – coincidence? Emmet Sweeney, however, contends that “the great Megalithic-building culture of Atlantic Europe and North Africa commenced around 1100 BC or perhaps a little earlier”! [700.208]
Proponents of the idea of a megalithic building in Atlantis see the location and extent of the megalithic structures as agreeing with Plato’s description, particularly his reference to Atlantis being ‘beyond the Pillars of Heracles’. However, the location of the ‘Pillars’ at the time of Solon’s visit to Egypt, is strongly disputed. In fact, the only territory unambiguously named by Plato as Atlantean was in southern Italy and North Africa along with several islands of which there are many in that region.
However, there are many features in Plato’s narrative that do not conform to our current knowledge of the megalith builders. There is no evidence that they had writing, irrigation technology or navigational skills to mount an attack on Egypt/Athens or any other characteristics ascribed to the Atlanteans by him.
On the other hand, if these attributes are just literary flesh applied to a skeleton of historical truth there is the possibility of a link between the Atlanteans and the megalith builders remaining.
Atlantis enthusiasts are quite happy to associate the megalith builders with Atlantis, as it provides something tangible to enhance the credibility of Plato’s narrative pointing to sites such as Stonehenge or the Maltese Temples. British researcher Robert John Langdon has gone further and proposed that the megalith builders originally came from Africa and settled in Doggerland at the end of the Ice Age, where they established Atlantis. When Doggerland was submerged they migrated to what is now mainland Britain, where they built Stonehenge as a memorial to Atlantis.
Megalith building in North Africa has been documented for over a century. The Hill of Graces by H.S. Cowper in 1897 concentrated on describing the megaliths in the region of Tripoli. The Mzora Stone Circle is a huge megalithic monument in Morocco and is considered to be the largest stone ellipse in the world. Further east the stone circle of Nabta Playa in Egypt had its importance further highlighted in a 2010 book by Robert Bauval & Thomas G. Brophy, Black Genesis. A 2012 illustrated paper reviews the range of megalithic monuments found across North Africa(af).
We must, of course, not omit the greatest megalithic monuments of all, namely, the Egyptian pyramids and particularly those at Giza. The apparent sophistication of their builders was greatly enhanced by the introduction of the Orion Correlation Theory (OCT) by Robert Bauval.
In a paper(at) published on Graham Hancock’s website in 2022, Freddy Silva proposed an additional OCT – in Scotland. He suggested that the Pyramids of Giza, and by extension, Orion’s Belt matched the layout of the three stone circles of Stenness, Brodgar and Bookan. In the same paper, he goes further identifying other megalithic monuments in Scotland with counterparts in Sardinia and Armenia! OCT is not without critics.
The megaliths of North Africa are not the only monuments to adorn that continent Atlantisforschung drew my attention to a number of short articles by William Corliss (al)(am)(an) highlighting what has become known as the Senegambian Complex and are now a UNESCO World Heritage site(ak).
Paul Dunbavin in his Atlantis of the West  and Towers of Atlantis  promotes the idea of a megalithic Atlantis centred off the coast of Wales in what is now the Irish Sea. In 2022 Dunbavin recorded(ao) that “In a review of the “Pathways to the Cosmos” conference held at Dublin Castle in September 2018, Liz Henty makes some perhaps surprising comments. She notes that this is the first such conference where archaeologists and archaeoastronomers have combined to broadly agree that some Neolithic monuments in Britain and Ireland were astronomically aligned(ap).
While not a new idea, a megalithic connection with Atlantis has recently been given further attention by the French writer Sylvain Tristan who was inspired by Jean Deruelle and Alan Butler. More recently, Jean-Michel Hermans, a French ethnologist, also added support for a megalithic Atlantis. Alfred deGrazia also joined this club as well as the German author Helmut Tributsch who has added his support to the idea of a megalithic Atlantis, specifically locating its capital on the island of Gavrinis in Brittany. A similar claim has been made by Hank Harrison, who also believes that the Morbihan region was an important Atlantean centre if not the location of its capital. Further support for a megalithic Atlantis has been given by Walter Schilling who places Plato’s city in the Bay of Cadiz. Robert Temple has recently offered grudging support for the concept of Atlantean megalith builders(ac).
Iberia is also home to very many megalithic structures of varying types. Recently, lower waters in a Spanish reservoir revealed once more the impressive 144-stone Dolmen-de-Guadalperal, situated roughly halfway between Madrid and the Portuguese border(z). Efforts are being made to ensure its preservation before the water levels rise again.
The most recent (2022) attempt at linking the megalith builders with Atlanteans has come from a disappointing book by Thomas Sheridan and Neil McDonald , in which their starting point is the magnificent megalithic remains found in the Orkneys that are situated just north of the Scottish mainland.
As far as I am aware classical writers make no obvious reference to the megalith builders, nor has this omission been commented on by modern writers. However, the numerous indirect references to Atlantis by the same ancient writers are deemed inadequate, which seems consistent with a dearth of information regarding early history.
It appears to me that other questions that have not been definitively answered relate to the identity of the megalith builders, why they stopped building and what happened to them. Another thought is that if the megalith builders lived at the same time as the Atlanteans, is it not strange that both disappeared around the same time or did they? My opinion is that we are probably confronted with two unrelated mysteries – the disappearance of the megalith builders and the demise of Atlantis.
Parallel with the megaliths of the eastern Atlantic seaboard are the megaliths of North America(ab), particularly those of New England(ag). Who built them and when? Are they evidence of very early pre-Columbian voyagers from Europe?(b) Nobody seems to have put forward the idea that megalith building might have spread from America to Europe! Is it such a wild suggestion?
Johnni Langer has published a lengthy paper on the prehistoric megaliths of South America and in particular Brazil. Generally speaking references to South American megaliths focus on Tiwanaku or Cuzco, considered to be relatively recent. However, Langer’s article has drawn attention to structures further afield in Brazil that suggest astronomical alignments(ar). Brazil continues to reveal more megalithic structures, unfortunately, in some cases only because of deforestation(au). The Brazilian discoveries have only added to the who and when questions relating to megaliths generally and whether there is any possible connection between the megalith builders and Atlantis.
An interesting article combining all the strange aspects of megalith building can be read online(c) which certainly offers food for thought. A paper(d) published in September 2013 gives a good overview of megalithic studies during the past few decades. Walter Haug’s well-illustrated website(k) offers a range of previously ignored megalithic sites in Germany.
Much nonsense has been written about the megalith builders, particularly on the Internet, where you find daft ideas such as attributing their construction to aliens(a). The suggestion that extraterrestrials had the technology to travel in space but when they land on earth they have to build observatories with stone is just silly. Why would they even need such crude observatories if they had the technology and astronomical knowledge to travel across the cosmos?
A valuable website dealing with the global spread of megalithic monuments is The Megalithic Portal established by Andy Burnham(g), which has regular updates. Other useful sites are Stone Pages(h) and Megalithic Ireland(i). Another site worth a look at is that of Sjur C. Papazian(l). There is also a site(j) dealing specifically with the dolmens of Corsica and Sardinia.
In the Middle East dolmens stretch in a line from the Caucasus(s)(p) to Yemen with a remarkable concentration of them in modern Jordan(m), a fact which prompted a former Dutch ambassador to Jordan, Gajus Scheltema, to write Megalithic Jordan. Jordan is also home to an ancient mysterious 150 km wall, which was 1-1.5 metres high(u).
Dolmens are also found in more distant lands such as India(r), Korea(n)(v) and Japan(o). It is difficult to look at the worldwide distribution of dolmens and not consider the possibility of some form of global cultural diffusion! Rarely discussed are the widely dispersed megalithic remains found throughout the Pacific islands(q).
A remarkable theory is presented by John M Jensen Jr to explain the function of dolmens throughout the globe, namely that they were constructed to protect from attacks by dinosaurs! This suggestion is part of a paper that claims that humans and dinosaurs co-existed(ad).
Another unusual claim comes from Yair Davidiy, a Brit-Am promoter, who wrote on their website – “Dolmens and Megalithic Monuments originated in Ancient Israel. Jeremiah 31:21 says that the Lost Ten Tribes will construct a trail of Megalithic Monuments from Israel to their places of exile and evidence of this path will enable them to return. Such a trail exists! It is the Trail of the Dolmens from the Middle East to the West.”(ae) As far as I’m aware Davidy has not explained the huge numbers of dolmens in places such as Korea and Japan! Professor W.A. Liebenberg has written a longer piece(aq) on the ‘Lost Tribes’ as the builders of the megaliths. However, since the megalithic building period is generally accepted to have lasted from around 4000 BC until 1500 BC, this created a problem for Davidy and Liebenberg. The disappearance of the Lost Tribes is dated to around 700 BC leading to their dispersal and proposed megalith building as they travelled. D & L include Newgrange (3200 BC) among their monuments and that is where their difficulties begin. Both claim that before 700 BC the year was 360 days in length (after Velikovsky [037.128]) rather than our present 365 days. They argue that if Newgrange (among other monuments) had been built when we had a 360-day year the sun would not still light up the interior at the winter solstice. Therefore, they conclude that most megaliths were erected AFTER 700 BC!>An alternative conclusion is that the idea of a 360-day year is flawed and that a date BEFORE 700 BC must be correct!<
There is a well-illustrated website offering an overview of the megalithic culture of Western Europe and the Mediterranean(t).
In February 2019 the Smithsonian Magazine had a report telling us that “Bettina Schulz Paulsson, an archaeologist at the University of Gothenburg, reexamined some 2,410 radiocarbon dating results that have been assigned to Europe’s megaliths and put them through a Bayesian statistical analysis. Based on the picture the data presents, Schulz Paulsson believes that the megaliths were first constructed by dwellers of northwest France during the second half of the fifth millennium BC.” (w)
Some years ago, the renowned English archaeologist, Aubrey Burl, concluded after twenty years of study that French immigrants had built Stonehenge(aa). More recently, Mike Parker Pearson, a leading Stonehenge expert, has also endorsed this idea of a French origin for megalith building(x).
Archaeologist, Robert Hensey in his insightful First Light [1766.9] has also noted that “Construction of Breton passage tombs is likely to have ended by 3900 BC, almost certainly by 3800 BC, and the most recent evidence from Ireland suggests that passage tomb construction had not yet begun on this island by that time.”
>Archaeologist Ashleigh Murzewski published a 2012 paper (av) on the significance of megalithic monuments in Atlamtis Europe and noted that “the construction of megalithic monuments in Atlantic Europe are not restricted to a single purpose, nor how they reflect one aspect of the community that built them.”<
Antequera is a city in Spain’s region of Andalucia. It is home to three megalithic structures (1) the “Dolmen de Menga”, (2)the “Dolmen de Viera” and (3) the “Tholos de Romeral” of which de Menga has been described as the largest and heaviest in Spain. They are collectively designated as a UNESCO World Heritage Site and described by that organisation as “These three tombs, buried beneath their original earth tumuli, are one of the most remarkable architectural works of European prehistory and one of the most important examples of European Megalithism.” The limited carbon dating that has been carried out would seem to indicate that construction took place sometime in the fourth millennium BC. Richard Cassaro has visited the site and posted an interesting report with many illustrations(ai).
The interesting claims of Schulz Paulsson, who places the origins of megalithic construction in Brittany in the fifth millennium BC, may be challenged by a little-known counterclaim that tombs in the Ox Mountains in the west of Ireland have been dated to the seventh millennium BC(y). However, my personal view is that it would be more likely that the practice of megalith building would have spread from the east or south rather than from Ireland westward!
A number of megalithic sites situated around the world are reviewed on the illustrated megalithic builders website. Contributions from popular writers, such as Hancock, Bauval and Schoch are included(ah).
A rational explanation for the construction of cyclopean masonry has been offered by Professor of Architecture Jean-Pierre Protzen and demonstrated on a YouTube clip(f).
(q) https://davidpratt.info/easter1.htm (section 10)