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 Bretons are a cultural grouping located in Brittany in northwest France, where the most outstanding megalithic monuments of Europe are situated. Today, the Bretons consider themselves a separate Celtic people, with a strong nationalist movement(c).
*It was in 1839 that the Rev. Algernon Herbert (1792-1855), Dean of Merton College, Oxford, was the first to use the term ‘megalithic’ in a paper describing the monuments of England and Brittany.*
Since the middle of the 19th century a number of commentators right up to the present have labelled the Bretons as Atlantean. These include R. Cedric Leonard(a), who In support of this idea cites both Stephen Oppenheimer and Herodotus, although he does so some reservations. Hank Harrison wrote Finding Atlantis in which, he supported the idea of a megalithic Atlantis with its centre of power probably located in the Morbihan area of Brittany.
In the 19th century, Ignatius Donnelly quoted Eugene Bodichon as expressing a similar view[021.389]. Bodichon’s opinion is simply based on the temperament and physical similarities between the Bretons and the Berbers of North Africa. Similarly, Gerry Forster refers to Bodichon’s opinion in his The Lost Continent Rediscovered(b). I do not think that the case is proven, even if the legendary kingdom of Ys, reputedly off the Brittany coast, is brought into the debate.
Armorica was the Latin name given by the Romans to what we know today as the Brittany peninsula. The region contains some of the most remarkable monuments created by the megalith builders, such as those found at Carnac and Morbihan,
Plato described the influence of Atlantis reaching as far as Italy and Libya (Tim. 25b). In Europe megalithic structures have been found extending all along the Atlantic seaboard and into the Mediterranean as far east as Italy(a) and all across North Africa including modern Libya and Egypt, it was understandable when some commentators concluded that these megalithic monuments were a cultural expression of the Atlanteans. The evidence available indicates that the spread of megalithic building was effected by a maritime based society. How much of this spread was brought about through military or trade expansion or just migration is not known.
A number of French and German researchers have identified Brittany as the power centre of the Atlantean ‘confederation’, while the American writer Hank Harrison is working on a book in which he will nominate Morbihan as a possible capital of Atlantis. R. Cedric Leonard has also written an interesting article(b) on the megalithic monuments of Brittany.
While megaliths are also found in the Middle East and across Asia as far as Japan, their greatest concentration is in Western Europe with a suggested focal point in Armorica. The legendary sunken city of Ys, often associated with Atlantis, is reputedly located off the coast of Armorica.
Brittany in northwestern France is sometimes referred to as Little or Lesser Britain. It is one of the most exciting regions of Megalithic Europe. The stone rows of Carnac are unequalled, Le Grand Menhir Brisé was once the largest standing stone in Europe, while Morbihan contains a huge number of dolmens and standing stones.2019 saw a report 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.” (b) Both Robert Hensey, who has studied and written about Newgrange [1766.6] and Mike Parker Pearson, Stonehenge’s leading, authority, have endorsed this idea of a French origin for megalith building(c).
The earliest suggestion that Atlantis may have been connected with the Armorican peninsula came from François Gidon in the 1930s when he proposed that Atlantis had been situated on an exposed Celtic Shelf stretching from Brittany to Ireland. Unfortunately, he dates the submergence of this land to between 3000 and 1200 BC, which was millennia after that part of the Celtic Shelf had been inundated by the Flandrian Transgression.
Jean Markle was convinced that the Carnac stones were connected with Atlantis. Recently, Sylvain Tristan followed the work of Jean Deruelle in supporting a megalithic Atlantis. Further support has come from Alfred deGrazia and Helmut Tributsch who saw Megalithic Europe as Atlantis with the island of Gavrinis in Brittany as its capital.
The American researcher, Hank Harrison, considers the Morbihan départment as a significant Atlantean location if not the home of its capital.
Reinoud deJonge proposes even greater significance for the Brittany megaliths with his claim that they record the Flood of Noah in 2344 BC(a).
A fairly lengthy illustrated paper regarding ancient catastrophes in Brittany is available online(d).
(a) See: Archive 2501
Labyrinths, are one of the many mysteries of the ancient world, with the earliest examples apparently dating back around 4,000 years(t). In Egypt, around 1800 BC Pharaoh Amenemhet III was responsible for building what is reputed to have been the largest labyrinth at Hawara containing three thousand rooms according to Herodotus, who visited it in the 5th century BC. Herodotus’ description inspired Athanasius Kircher to draw a plan of the underground complex(u).
The Labyrinth along with the double-headed axe, the labyris, are usually associated with Minoan culture. However, the labyrinth is an ancient symbol found around the world in locations such as Italy(s), India(g), Egypt(h), England(q), Finland(r)and even in the New World as Evan Hadingham has shown an example [1309.261] at Pacatnamú in Peru. In Scandinavia, they are known as Troy Towns – Trojeborgar. Sweden has the greatest number with 200(e).
The largest example in Sweden was discovered at the Mesolithic site on Blå Jungfrun Island(j).
Tracy Boyd, in a lengthy paper(m) about Chartres Cathedral, mentions in footnote 27 that “Many of the labyrinths originally installed in cathedrals in France were later destroyed by the Church itself”!
Eberhard Zangger claimed that “most labyrinths are found around the Mediterranean” and “that at the end of the Bronze Age, the labyrinth was a recognised pattern around the eastern Mediterranean.” [484.136] He proceeds to link the labyrinth with Troy, which, in an earlier book  he had identified as Atlantis.
India’s second-largest example, measuring 56 feet by 56 feet, was partly uncovered in Gedimedu near Pollachi(i) in 2015. It is estimated to be 2,000 years old and has a design similar to those found on clay tablets found at Pylos, Greece, from 1200 BC.
It has been suggested by a number of writers that the labyrinth had some connection with Atlantis(a)(b). Such suggestions are interesting but highly speculative. Lewis Spence does so in The History of Atlantis. J. D. Brady touches on this in his book, Atlantis where he announced that Atlantean gold treasure was to be found within a labyrinth on the Greek island of Lemnos.
What I find interesting is that so many widespread examples of the labyrinth retain the irregular elements of the symbol even when depicted in a rectangular rather than a rounded style. An extensive website covering all aspects of labyrinths and mazes is worth a visit(c). There is also The Labyrinth Society(f) to further whet your appetite.
In 2014 an article(o) by April Holloway described a collection of labyrinths that I consider the most mysterious of all. They are situated on Russia’s Solovetsky Islands (or Solovki), which “are an archipelago located in the Onega Bay of the White Sea, Russia. It is here where there can be found thirty-five Neolithic labyrinths, known as ‘vavilons’ (‘Babylons’) in the local dialect, which date back to around 3,000 BC. The most remarkable are the stone labyrinths of Bolshoi Zayatsky Island, a group of fourteen labyrinths in a 0.4km 2 area.” The Atlas Obscura website offers a number of images(p).
In 2017, an extensive article by John Reppion offers further information on the history and geographical spread of labyrinths(k). Similarly, Gary Vey offers an article with additional information and more images(l).
Some researchers have attempted to link the outline of the labyrinth with the concentric design of the harbour of Plato’s capital city. The harbour was described as a series of perfectly concentric circular features ‘as if created on a lathe’ (Critias 113d), whereas the labyrinth is more spiral with a slightly offset entrance. My conclusion regarding the labyrinth is; fascinating– yes, Atlantis – probably not.
The persistent use of this ancient symbol was highlighted by an aerial image, sent to me by Hank Harrison, of a Catholic school in California.
Hank Harrison (1941- ) is an American writer and publisher and sometimes better known as the father of the singer, Courtney Love and father-in-law of the late Kurt Cobain. Among a range of subjects he has expressed great interest in Megalithic Europe in two of his books, The Stones of Ancient Ireland(a) and Finding Atlantis. In the latter, he supports the idea of a megalithic Atlantis with its centre of power probably located in the Morbihan area of Brittany.
>In The Cauldron and the Grail  Harrison focuses on the cultural background of the megalith builders. His instincts told him that many of the important sites had both a functional purpose an astronomical predictors and as early religious centres.<
Another recent book by Harrison is Arthur the God(b).
(a) https://www.arkives.com/soai/soai.pdf (offline Mar.2016) see Archive 2930)
Helmut Tributsch (1943- ) was born in a small German-speaking enclave in Fruili in North East Italy. He was a Professor of Physical Chemistry from 1982 at the Free University of Berlin until his retirement in 2008. When his birthplace was destroyed in 1976 by an earthquake he began a study of animal behaviour prior to such events and their role as earthquake predictors, leading to the publication of Wenn die Schlangen erwachen (When the Snakes Awaken) in 1978.
His interests also extended to include Atlantis, regarding which, he published Die Gläsernen Türme von Atlantis (The Glass Towers of Atlantis) in 1986. His view was that megalithic Europe, North Africa and the Mediterranean constituted Atlantis, bounded by water on three sides and a little-known border to the east, it could be considered an island. Tributsch suggested that the island of Gavrinis near Carnac in Brittany had been the capital of this Atlantean civilisation.(c) Hank Harrison placed Atlantis in the same locality.
Tributsch dated the destruction of Atlantis to 2200 BC, a date also favoured by Anton Mifsud.
Further details regarding the content of Tributsch’s book, in English, are available on his website(a).
A more extensive article about the theories of Tributsch is available on the Atlantisforschung website with an English translation here(d).
(a) 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) (English) *
The Identity of the Atlanteans has produced a range of speculative suggestions nearly as extensive as that of the proposed locations for Plato’s lost island. However, it is highly probable that we already know who the Atlanteans were, but under a different name.
The list below includes some of the more popular suggestions and as such is not necessarily exhaustive. While researchers have proposed particular locations for Atlantis, not all have identified an archaeologically identified culture to go with their chosen location. The problem is that most of the places suggested have endured successive invasions over the millennia by different peoples.
It would seem therefore that the most fruitful approach to solving the problem of identifying the Atlanteans would be to first focus on trying to determine the date of the demise of Atlantis. This should reduce the number of possible candidates, making it easier to identify the Atlanteans.
A final point to consider is that the historical Atlanteans were a military alliance, and as such may have included more than one or none of those listed here. The mythological Atlanteans, who included the five sets of male twins and their successors would be expected to share a common culture, whereas military coalitions are frequently more disparate.
Basques: William Lewy d’Abartiague, Edward Taylor Fletcher
Maltese: Anton Mifsud, Francis Xavier Aloisio, Kevin Falzon, Bibischok, Joseph Bosco, David Calvert-Orange, Giorgio Grongnet de Vasse, Albert Nikas, Joseph S. Ellul, Francis Galea, Tammam Kisrawi, Charles Savona-Ventura, Hubert Zeitlmair.
Maya: Robert B. Stacy-Judd, Charles Gates Dawes, Colin Wilson, Adrian Gilbert, L. M. Hosea, Augustus le Plongeon, Teobert Maler, Joachim Rittstieg, Lewis Spence, Edward Herbert Thompson, Jean-Frédérick de Waldeck,
Minoans: K.T. Frost, James Baikie, Walter Leaf, Edwin Balch, Donald A. Mackenzie, Ralph Magoffin, Spyridon Marinatos, Georges Poisson, Wilhelm Brandenstein, A. Galanopoulos, J. G. Bennett, Rhys Carpenter, P.B.S. Andrews, Edward Bacon, Willy Ley, J.V. Luce, James W. Mavor, Henry M. Eichner, Prince Michael of Greece, Nicholas Platon, N.W. Tschoegl, Richard Mooney, Rupert Furneaux, Martin Ebon, Francis Hitching, Charles Pellegrino, Rodney Castleden, Graham Phillips, Jacques Lebeau, Luana Monte, Fredrik Bruins, Gavin Menzies, Lee R. Kerr, Daniel P. Buckley.
France has had little mention in connection with the Atlantis mystery except by Marcel Mestadgh who was convinced that France was the centre of an ancient civilisation with its capital in the city of Sens. The late Philip Coppens discussed Mestdagh’s theories in two of his books, which in turn led to a two-part essay(f)(g) by Bruce Jeffries-Fox.
However, in the early years of the 20th century Jean-Léopold Courcelle-Seneuil, a French writer, is reported to have proposed that the Auvergne region of Central France had been associated with Atlantis.
Another mysterious feature of ancient France is centred on the town of Alaise from which it was discovered that 24 radial ley lines emanated. These were identified by Xavier Guichard (1870-1947) a former Parisian police chief(e). In 1936, he self-published the heavily illustrated Eleusis Alesia  outlining his research in great detail. John Sase, in his Curious Alignments , confirmed Guichard’s findings.
However, in the 1990s Emile Mourey developed a theory that saw the Atlantean ‘Empire’ covering most of western Europe and all of North Africa as far east as Egypt. He places its capital at what is now the village of Gergovie(b) in the départment of Puy-de-Dôme. This Atlantis, according to Mourey, was not destroyed but after 509 BC was known as Gaul!
Brittany, in northwestern France, is the centre of some of the most spectacular megalithic monuments in Europe. From the middle of the 20th century onwards several researchers have striven to link Atlantis with these remarkable structures. In this connection the work of Deruelle, Tristan, Helmut Tributsch and Hank Harrison must be mentioned. French ethnologist Jean-Michel Hermans has recently joined the ranks of these supporters of a megalithic Atlantis.
In February 2019, a report in the Smithsonian Magazine told 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 Bayesian statistical analysis. Based on the picture 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.”(h) Mike Parker Pearson, the leading Stonehenge expert, has endorsed this idea of a French origin for megalith building(i) as has Aubrey Burl and more recently Robert Hensey [1766.6].
However, a note of caution has been expressed by Walter Willems in Der Spiegel, who has rightly pointed out that “there also exist megalithic structures in North Africa, as in Egypt, Libya, Tunisia and Morocco. These have hardly been dated up to now and were not taken into account in the analysis.”(j) I should add that similar monuments are to be found in the Caucasus, Jordan and Korea in great numbers and at many other locations around the globe, which should be included in a broader study.
Additionally, the ever-modest Dean Clarke has written(a) of a series of extensive prehistoric floods in France that he links with the flooding of Atlantis.
Timagenus, the Greek historian, noted that there were French tribes who claimed that Atlantis had been the home of their ancestors.
Returning to the matter of Atlantis, we find that Didier Coilhac has published an extensive paper in which he claims that statuary and paintings at the Palace of Versailles held encoded details of the story of Atlantis!(k) He has applied his theory to a number of other historical buildings and monuments(l).
(k) The Palace of Versailles codes Atlantis. (didiercoilhac.com) (French) (link broken)
(l) Home – Didier Coilhac (French) (link broken)
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!
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.”
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)