Aegean Sea
Howells, Caleb
>>Caleb Howells is a British researcher with a passion for ancient history. He has already published a book about King Arthur [2077] and now offers a new look at the story of Brutus the Trojan King of Britain [2076] in The Trojan Kings of Britain. In addition, he has published numerous articles on a wide range of historical subjects(i). A number of these were produced as a content writer for the Greek Reporter website, where he has recently (2023) endeavoured to revive the ailing Minoan Hypothesis (a)(b).<<
Plato came from Athens, a city frequently damaged by earthquakes, he also spent time in Sicily where he must have been made aware of the continually active volcano, Mount Etna. Consequently, it is reasonable to assume that Plato could distinguish between an earthquake and a volcano, so when he wrote that Thera had been destroyed by an earthquake, that is what he intended to say. Furthermore, his description of the submergence of Atlantis as a result of the ‘quake sound very much like liquefaction frequently associated with such events. The Minoan Hypothesis does not match Plato’s account.
Although I disagree with Howells’ identification of Atlantis as Minoan, I was pleasantly surprised that in a December 2023 article(c) he tackled the question of the Pillars of Herakles which included many of the points already published in Atlantipedia. He notes the use of the phrase as a metaphor, particularly by Pindar who used it “as an expression denoting the outermost limit of something. His use of the phrase ‘beyond that the wise cannot set foot’ indicates that he was not merely talking about athletic limits, but limits in general.” Howells also points out the multiplicity of locations designated as ‘Pillars’ and that more than one location were so called at the same time. Nevertheless, he cannot let go of a possible Minoan connection and so proposed the Gulf of Laconia where the Capes Matapan (Tainaron) and Maleas in the Peloponnese are the two most southerly points of mainland Greece. They had been proposed over forty years ago by Galanopoulos & Bacon [0263] as the ‘Pillars’ when the early Greeks were initially confined to the Aegean Sea and the two promontories were the western limits of their maritime knowledge at that time. Overall, Howells’ article is interesting but unoriginal.
A few days later (12/12/23) he cast doubts on the Capes Matapan and Maleas as the location of the Pillars of Herakles(d). Howells is like a dog with a bone where the Minoan Hypothesis is concerned and by now should be realising the true complexity of the Atlantis story.
Atlantis was destroyed by submergence following an earthquake, not a volcanic eruption. The Minoans were traders not invaders, so if Crete was Atlantis where is there mention of a war between Athens and the Minoans?(See Below) Atlantis was a confederation of some sort, so who were its constituents? Why did Plato not simply name the not-too-distant Cretans as the attackers of Athens and laud the victory of the Athenians?
In late January 2024, Howells expanded his efforts to bolster the Minoan Hypothesis. This time, using some rather convoluted reasoning, he identifies ancient Crete as the Caphtor referred to in the Bible.
This is another contentious issue among historians. The matter is discussed more fully in the Caphtor-Keftiu entry here, where you will find a number of locations identified as Caphtor, including Cyprus, Crete, Cilicia and the Nile Delta. Although currently the most popular would appear to be Crete, Wikipedia seems to favour the Egyptian region of Pelusium(e)!
Cyprus had previously been the most favoured location, about whom Immanuel Velikovsky noted(f) “if Caphtor is not Cyprus, then the Old Tesrament completely omits referenceto this large island close to the Syrian coast.” The Cypriot identification has been endorse by a number of commentators such as John Strange, author of Caphtor/Keftiu: A new Investigation[1052]. I think that with so much controversy surrounding the indentity of the Caphtorim that its possible value as support for the equally controversial Minoan Hypothesis is substantially weakened.
Furthermore, I note that in 2022, Phil Butler published a paper that also suggested identifying the Keftiu as Atlantean.
A number of commentators have supported the idea of Atlantis in the Aegean region. The most convincing, in my opinion, have come from Peter James [047], Eberhard Zangger [483] and more recently Nicholas Costa [2072] , all of whom designated an Anatolian location for Atlantis. They all have their shortcomings but have built stronger cases than Howells for their chosen locations.
>>In September 2024, Howells published a YouTube video complaining about my treatment of his support for the Minoan Hypothesis (MH). To be clear, I bear no ill will towards Caleb, who seems to be an affable individual. For my part, as a grumpy old man, I have become quite intolerant of most of what is written today about Atlantis. The Minoan Hypothesis has developed over the past century, but, in my opinion, has not improved with age. Like most Atlantis theories it aligns with some of the characteristics described by Plato, but never all of them. I shall return to this shortly.
First, Howells was unhappy that I did not seem to give his historical work precedence over his teaching, which was inadvertent and now rectified. His other complaints are more contentious, starting with the war with the Mycenaeans. Until recently, the Minoans were generally considered to have been a peaceful nation. It is only recently that the idea of warlike Minoans have been seriously mooted, led by University of Sheffield archaeologist Barry Molloy(h), but, remains a minority view. My understanding is that the Mycenaeans (Greeks) attacked the Minoans (Atlanteans!), not the other way around as Plato described it. In Howells’ paper investigating Santorini as Atlantis he states “We do not know who the aggressor in this historical war really was.” The same paper(b) suggests that Santorini may have been Atlantis, which, for me, implied that the Temple of Poseidon would have been on the pre-eruption island. Howells, devotes this article to listing the similarities between Santorini and Plato’s Atlantis, but ends without any firm conclusion!
The identification of Caphtor with Crete is generally, but not universally, accepted and is not an issue for me. However, it does highlight how so little in ancient history is clear-cut.
My objections to the MH among other matters include –
>The fact that Plato clearly attributes the destruction of Atlantis to an earthquake and not to an eruption.
>Neither Crete nor Santorini was submerged or created any shipping hazard that lasted until Plato’s time.
>The missing elephants, described by Plato as being “of its nature the largest and most voracious” (Crit. 114e-115a). Certainly, they are not pygmy elephants.
>Where are the mountains situated to the north of the Plain of Atlantis described “as surpassing all that now exists in number magnitude and beauty.”
For me and many others, individually or combined, these facts remove Thera/Crete as a serious contender as the location of Plato’s Atlantis.
Finally, I must insist that I never intentionally set out to misrepresent anybody, I try to offer all sides of a debate, even those I dislike, which is why Atlantipedia includes many thousands of links, allowing readers to decide for themselves. For that reason, I greatly resent being accused of unreliability, when Howells’ real gripe should not be with me but Plato.<<
(a) Was Atlantis’ Temple of Poseidon the Palace of Knossos in Crete? (greekreporter.com)
(b) Was Atlantis a Minoan Civilization on Santorini Island? (greekreporter.com)
(c) https://greekreporter.com/2023/12/07/pillars-hercules-greek-mythology/
(d) https://greekreporter.com/2023/12/12/mythical-atlantis-located/
(f) Ages in Chaos p.210 n.79
(g) The Keftiu: Were They Absorbed and Erased from History? (argophilia.com)
Kyrki, Costa
Costa Kyrki is a successful Italian architect with an interest in Atlantis. In 2014, after twenty years of research, he published a paper entitled Lost Atlantis in which he placed Atlantis, also known as Aigas, in the Aegean Sea, from which it got its name. He specifically locates sunken Atlantis between the island of Samos and Miletus on what is now mainland Turkey. The destruction of Atlantis he attributes to ‘a fall of meteorites’ sometime between 5000 and 3000 BC(a)!
Euclid of Megara
Euclid of Megara (435-365 BC) was a Greek philosopher and a pupil of Socrates. Although he wrote six dialogues, none have survived. Our principal source is Diogenes Laërtius who used his text.
Josiah Priest refers to Euclid as a believer in the reality of Atlantis in his 1835 book American Antiquities [1143.82/3]. Apparently, Euclid met with Anacharsis the Scythian philosopher and their discussions turned to the ‘convulsions of the globe’ including the separation of Sicily from Italy and the destruction of Atlantis.
Similarly, in the Atlantic, “there existed, according to ancient traditions, an island as large as Africa, which, with all its wretched inhabitants was swallowed up by an earthquake.”
Beyond the isthmus, of which I have just spoken, said Euclid, according to ancient traditions, an island as large as Africa, which, with all its wretched inhabitants, was swallowed up by an earthquake.
Priest then refers to Euclid again [p.83] claiming that “here, then, is another witness, besides Solon, who lived 300 years before the time of Euclid, who testifies to the past existence of the island of Atalantis.”
Furthermore, according to Euclid, it was the Black Sea that broke into the Aegean Sea, rather than the other way round. Since Anacharsis came from the northern coast of the Black Sea we can reasonably assume that he had local knowledge to back up this suggestion!
Daily Express (UK)
The Daily Express is a well-known British tabloid newspaper. Together with its sister publications, The Sunday Express and its online Express.co.uk, it has recently set a new record for the number of ‘might be Atlantis’ articles published, all with the byline of Callum Hoare. During the first three weeks of 2019, he has managed to produce four stories suggesting four different locations for Atlantis – Doggerland(a), Malta(b), Azores(c) and the Bahamas(d). But I did not have to wait long for the next regurgitation from Hoare, with another piece mined from a recent Amazon Prime documentary, where the Atlantis in the Canaries theory is reviewed (21.1.19)(e). I note that Hoare was also the author of similar BS Atlantis stories for another alleged UK newspaper, The Daily Star. The quality of research continues to be abysmal, citations are often years old, facts are mangled and quite misleading. Definitely ‘Fake News’.
Unfortunately, this outpouring of nonsense continued on in 2020. June 30th saw the ‘Express’ publish another article(f) by Hoare with an “Atlantis Located” headline. This gem begins by repeating the view of ‘expert’ Matthew Sibson, who advocates Rockall as the site of Atlantis and then switches to the opinions of Christos Djonis who claims the Aegean Sea as the home of Atlantis. According to Hoare, in this instance, Djonis refers to the research of Mark McMenamin of around 25 years ago who noticed on some Carthaginian gold staters of the fourth century BC that they had tiny engravings that he subjectively interpreted as rough maps showing both Asia and America and centred on Sardinia(g). This, according to Djonis, indicates the possibility that the Greeks may have had knowledge of America!
Djonis and Hoare were obviously unaware that in 2000, McMenamin was obliged to confirm that the coins in question were fakes(k) as revealed in his book, Phoenicians, Fakes and Barry Fell [1738].
Furthermore, Djonis is contradicted by the clear statement of Herodotus that the Greeks only knew three continents, Europe, Asia and Libya (Africa)(h). Finally, if Djonis thinks that Atlantis was located in the Aegean what has America got to do with his theory?
July 2020 saw Hoare pollute the Express with another ‘Atlantis Found’ piece, this time locating it off the coast of Cornwall(j). This story is a quarter of a century old and a few years ago its credibility and even the existence of the institution to which its original author, Viatcheslav Koudriavtsev, was supposed to belong to, was brought into question(i).
Hoare ended the year with another pathetic attempt(l) to revive interest in the Minoan Hypothesis as well as the failed claim that the Spanish Donana Marshes held the remains of Atlantis or Tartessos!
>In January 2021, he continued his recycling of old Atlantis claims, with the 35-year-old story of the submerged rock formation off Yonaguni in Japan(m). Later in the same month we were regaled with yet another “Atlantis Found?” headline(n), which led on to report that the remains of another submerged city had been discovered off the Greek island of Zakynthos. No direct link with Atlantis was claimed!<
(g) https://www.researchgate.net/publication/236000049_Cartography_on_Carthaginian_Gold_Staters
(h) Herodotus, Histories 4.42.
(i) https://shimajournal.org/issues/v10n2/k.-Hallerton-Shima-v10n2.pdf
Rambling, J. P.
J. P. Rambling (a pseudonym?) is the author of the Redefining Atlantis website(a), which started in January 2016 and offers a serious investigation of matters relating to Atlantis. He favours an Aegean location for Atlantis with the city situated in the south of an enlarged landmass, where Santorini lies today.
Greece
Greece as the home of Atlantis was unknown until the end of the 19th and the beginning of the 20th centuries when the Minoan Hypothesis began to evolve and is still one of the more popular theories today. Other locations in the Aegean have been proposed by researchers such as Paulino Zamarro and C. A. Djonis as well as three Italian linguists, Facchetti, Negri and Notti, who presented a paper(a) to the 2005 Atlantis Conference outlining their reasons for supporting an Aegean backdrop to the Atlantis story.
Mainland Greece has also been proposed as home to Atlantis. In the middle of the 20th century R. L. Scranton suggested Lake Copaïs in Boeotia, an idea later modified by Oliver D. Smith, who subsequently completely abandoned the idea of Atlantis as a reality. More recently, it has been proposed that Atlantis was just an allegory of Athens and that its port, ancient Piraeus, was partly the inspiration behind Plato’s description of Atlantis(b). On the other hand, the Dutch linguist, Joannes Richter, also views the Plato’s story as fiction and suggested that “probably Plato used the model of the draining and irrigation system at Lake Copais as a model for the ancient metropolis at the ‘island Atlantis’ in an imaginary war between Athens and Atlantis.”(c)
The sunken Greek cities of Pavlopetri and Helike have also prompted suggestions of a connection with Plato’s lost island.
(a) https://atlantipedia.ie/samples/document-250811/
(b) Archive 2887 | (atlantipedia.ie) (see last paragraphs)
(c) https://www.academia.edu/41219454/The_War_against_Atlantis?sm=a (link broken) *
Apulia, Izabol *
Izabol Apulia (1977- ) is a young dedicated hobbyist cartographer, who lives in Mesa, Arizona. She has developed a huge collection of maps(a), principally of Mediterranean islands, that depicts them at various stages between the Last Glacial Maximum and the present, showing how the rising sea levels gradually reduced them in size. She is highly critical of the sea level data developed and published by Kurt Lambeck and his team, preferring to use her own figures .
Apulia is also an inveterate blogger, using the name of ‘mapmistress’. She frequently published text to accompany individual maps that are often quite interesting. However, when she commented on Atlantis, in my opinion, she was seriously in error. Her big claim is that English translations of Plato’s text have been ‘botched’, in particular the work of Benjamin Jowett, whom she claims ‘invented’ the word Atlantis, which she further claims reads as ‘Atlas’ in the original text!
Not content with that, she places the Pillars of Heracles on Rhodes, with Atlantis to the north of that island in the Aegean.(b)
(a) See: https://web.archive.org/web/20180215195713/https://mapmistress.com/
(b) https://pseudoastro.wordpress.com/2009/02/01/planet-x-and-2012-the-pole-shift-geographic-spin-axis-explained-and-debunked/ (about half way down page)
(c) https://web.archive.org/web/20160624002531/https://mapmistress.blog.com/timescale/ or See Archive 2566 | (atlantipedia.ie) *
Djonis, Christos A.
Christos A. Djonis is a Greek Cypriot now living in the United States. His first book Cyprus-The Island of Aphrodite, is a travel guide to that island. He has now ventured into much deeper waters with his latest book Uchronia-Atlantis Revealed[0935]. The central core of his theory is that Atlantis lay in the Aegean Sea, to the north of Thera, which itself contained the capital city of the Atlantean confederation. He gives no credit to Paulino Zamarro who proposed a similar location fifteen years ago[0024].
Djonis accepts 9600 BC as the time of its existence as the lower sea level then would have created a single landmass with a large central plain. Among his other claims is the idea that during the Bronze Age the Minoans “were not only heavily mining copper from the area around Lake Superior, but they were regularly carrying tobacco and other spices from the Americas back to Santorini.”(d)
He supports this link with North America with the geographical spread of the human mitochondrial DNA designated Haplogroup X. In his own words(e),
“While most geneticists today maintain that haplogroup X walked to America via the Bering Strait, genetic maps show that the furthest region east of the Mediterranean with small traces of haplogroup X, is the Altai Republic in Southern Russia. No traces of haplogroup X exist between Altai Republic and the greater region of the Great Lakes. If haplogroup X infiltrated North America via the Bering Strait, why then does the greatest concentration of haplogroup X (away from the Mediterranean) exist around the Great Lakes and not in Alaska or alongside the west coast? Most importantly, how do we otherwise explain that heavy traces of haplogroup X incidentally also exist in Scotland, Orkney Islands, Faroe islands and Iceland, essentially all the island stops to North America from Europe.”
Not unexpectedly, Jason Colavito, who denies the existence of Atlantis, wrote a highly critical review of Djonis’ claims and had further exchanges with Djonis in the comments section of his blog(i).
Even more damning is that Djonis cites the 1996 claim of Mark McMenamin that ancient Carthaginian coins depicted America. Unfortunately, Djonis was apparently unaware that in 2000, McMenamin was obliged to confirm that the coins in question were fakes(k) as revealed in his book, Phoenicians, Fakes and Barry Fell [1738]. Nevertheless, as recently as 2020 Djonis was still being quoted in the media(m)(n) as using the fake coins as evidence for the existence of Atlantis. He continued to tout this falsehood into September 2021(o).
>In a December 2022 article, Djonis suggested that Atlantis lies under 400 feet of water in the Aegean(p). Unfortunately, this conflicts with Plato’s text which tells us that as late as Plato’s time the place where Atlantis had been submerged was still a maritime hazard. Keeping in mind that Kurt Lambeck has demonstrated(q) from a study of Roman fish pens that the sea level along the Italian coast, 2000 years ago, was just 1.35 metres below today’s levels and if we add a generous additional foot to take us back to Plato’s day, we can calculate that Atlantis should now be in around 5, not 400 feet, of water.<
Djonis does not explain why Plato unambiguously stated that the Atlanteans came from the west (Tim.25b & Crit.114c) and yet Djonis’ Atlantis is situated to the southeast of Athens and north of Egypt? In fact, what Plato said was that the invasion came from the Atlantic Sea (pelagos). Although there is some disagreement about the location of this Atlantic Sea, all candidates proposed so far are far west of both Athens and Egypt.
Instead, he prefers to parrot the discredited ancient astronaut theories of Zechariah Sitchin, based on his flawed interpretation of Sumerian texts. These include claims that humans were ‘created’ by these extraterrestrial visitors. In fact, he wastes over half his book discussing UFOs and ETs.
In April 2016 Djonis had an article published on the Ancient Origins website(j), in which he discussed Sitchin’s theory of Planet X without arriving at any conclusions. Why?
I did not find Djonis convincing regarding either the Annunaki or Atlantis.
January 2016 had Djonis plunge into the muddy waters relating to the early discovery of America with a three-part article on the Ancient Origins website(f). Not unexpectedly, Jason Colavito had few caustic comments to offer on this latest offering from Djonis(g).
Recently, Djonis and I exchanged emails in which I offered some of my reasons for rejecting his ideas. Clearly unhappy with my comments, he has now used Ancient Origins to rehash(h) his flawed ideas. Included in his offering is a sarcastic reference to me as an ‘expert’, a title I have never used or claimed. Apart from his support for the idea of ancient astronauts, which he carefully avoided in this recent article, my main gripe is that Djonis’ is content to discard elements in Plato’s account without any justifiable reason. Djonis presumptuously wrote of me that there is “no doubt in his mind that Atlantis was a myth.” On the contrary, I believe that it is highly probable that Atlantis existed, but, it is also quite clear that Plato’s narrative contains mythical elements that may have impeded researchers seeking to identify the historical Atlantis.
In 2021, Djonis published Atlantis: The Find of a Lifetime [1857], in which, unsurprisingly, he just recycles the Uchronia material along with a degree of padding. This new and ‘expanded’ edition is in fact listed as 20 pages shorter. As of June 21st, I found it strange that the book is not mentioned on Djonis’ website(l)!
A YouTube clip(b) and PowerPoint presentation(c) are also available.
(a) https://www.atlantisislandrevealed.com/
(b) https://www.youtube.com/watch?v=ok7PphlD9mw&feature=youtu.be
(c) https://vimeo.com/79041220
(d) https://www.atlantisislandrevealed.com/#!the-minoans/cr2t
(i) https://www.jasoncolavito.com/blog/new-atlantis-claim-places-lost-continent-in-Cyclades
(l) ChristosDjonis.com: Author | BOOKS (cdjonis.com)
(p) Atlantis: How Plato’s Story Corresponds to Real History (greekreporter.com) *
Pindar
Pindar (522-443 BC) was one of the nine ancient Greek lyric poets. He refers to the ‘Pillars of Heracles’ in three of his victory odes, Olympian 3.43-45, Nemean 3.19-23 and Isthmian 4.11-13, doing so in a manner which indicates that the term was used as a metaphor for the limit of human (Greek) experience. As such, the location of the Pillars would have changed as the colonial and commercial expansion of the Greeks developed beyond the Aegean.
>One commentator has interpreted Pindar’s Olympian Ode 3 as referring to the Pillars of Herakles being placed at the ‘Springs of Ister’ on the Danube near Belgrade, noting that “this is the very edge of Pindar’s Celtic world and a point beyond which a Greek probably did not want to venture.“(b)<
Oliver D.Smith has drawn attention to the Nemean Ode 4, 65-70 as having echoes of Plato’s description in it(a).
(a) https://atlantisresearch.wordpress.com/ (now offline)
Strait of Gibraltar
The Strait of Gibraltar according to Greek mythology was created by Herakles. Neville Chipulina explains that “it seems that the person responsible for the myths about Hercules was Peisander of Rhodes, a 7th century BC Greek epic poet who apparently got the story from an unknown Pisinus of Lindus who almost certainly plagiarised it from somebody else. In other words, it’s a pretty old story.”(c)
The Strait is very much a part of many current Atlantis theories. Primarily, it is contended that the region itself held the location of Atlantis. This is based on Plato’s statement that Eumelos, also known as Gadeirus, the twin brother of Atlas the first king of Atlantis gave his name to Gades, known today as Cadiz. Andalusia in Southern Spain has been the focus of attention for over a hundred years. In recent years Georgeos Diaz-Montexano and his rival Jacques Colina- Girard have been investigating the waters of the Strait itself while south of the Strait Jonas Bergman has advanced his theory that Atlantis was located just across the Strait in Morocco.
Although there is general acceptance that the Pillars of Heracles had their final resting place in the vicinity of the Strait of Gibraltar, it must be noted that there have been other candidates at different times with equally valid claims. The location of the ‘Pillars’ referred to by Plato at the time of Atlantis is the subject of continuing debate.
>Archaeologist Josho Brouwers has noted(g) that “according to Strabo (3.5.5), Hercules raised the Pillars during one of his Twelve Labours to mark the western edge of the inhabited world. One pillar was identified as the Rock of Gibraltar (called Mount Calpe in ancient times), with the other was Ceuta (Mount Abile) on the African side of the narrow strait.
Diodorus Siculus mentions that Hercules put the Pillars in place as a monument to himself (4.18.4). He also adds that Hercules either narrowed the passage in order to prevent sea-monsters from the Atlantic to enter the Mediterranean, or to actually open the mountain so that the Atlantic could mingle with the Mediterranean. On this issue, as Diodorus puts it, “it will be possible for every man to think as he may please” (4.18.5).” For me it raises a warning flag regarding the hasty acceptance of ancient myths and traditions as having an historical basis.<
Strato, the philosopher, quoted by Strabo, spoke of a dam separating the Atlantic and the Mediterranean being breached by a cataclysm. This idea was reinforced by comments of Seneca. Furthermore, a number of Arabic writers, including Al-Mas’udi, Al-Biruni and Al-Idrisi, have all concurred with this idea of a Gibraltar land bridge in late prehistory.
A more radical theory is that of Paulino Zamarro who contends that the Strait was in fact closed by a landbridge during the last Ice Age because of the lower sea levels together with silting. When the waters rose and breached the landbridge, he believes that the flood submerged Atlantis, which he situates in the Aegean. Others support Zamarro’s idea of a Gibraltar Dam amongst whom are Constantin Benetatos and Joseph S. Ellul.
Terry Westerman on his heavily illustrated website surveys impact craters globally. He suggests that “The Strait of Gibraltar was formed by two meteor impacts. The first blasted the round area in the western Mediterranean Sea to form a land bridge between Spain and Morocco.” He maintains that a second impact broke the landbridge around 5.33 million years ago, creating what is called the Zanclean Flood which refilled the then desiccated Mediterranean(d).
A German-language website(a) presented some of the following data+, apparently recording the dramatic widening of the Strait of Gibraltar between 400 BC and 400 AD. The same list was included in the ‘Strait of Gibraltar’ entry of the German Wikipedia(b) until a few years ago. It has since been removed.
Alexander Braghine offered [156.139] similar data*, which, unfortunately, is also unreferenced.
+Damastes of Sigeum, circa 400 BC. – about 1.3 km
+Pseudo-Skylax, probably fourth Century BC – about 1.3 km
*Turiano Greslio? 300BC – 8.0 km
*+Titus Livius (Livy) 59 BC- 17 AD – 10.5 km
+Strabo 63 BC- 24 AD – from 9.5 to 13.0 km
+Pomponius Mela , 50 AD – about the 15.0 km
+Pliny the Elder, 50 AD – about 15.0 km
*+Victor Vicensa (*Vitensa?), 400 AD – about 18 km
Procopius, 550 AD – about 15.0 km
The above figures suggest that in the latter half of the first millennium BC, the Strait of Gibraltar was gradually widened. However, the figures given suggest that between 400 and 550 AD the Straits narrowed again seems absurd. Nevertheless, until the methods used and all the data on offer have been verified, the idea must be treated with great caution.
My list had originally included Euctemon, the 5th century BC Athenian astronomer, however, Werner E. Friedrich notes that Euctemon was referring to the Sea of Marmara near the entrance to the Black Sea [0695.38].
However, more recently, John Jensen Jnr. has offered a comparable, if shorter, number of dates showing the reducing width of the strait the further back you go, from which he extrapolated that around 3450 YBP when he believes that a landbridge there was breached(e).
Georgeos Diaz-Montexano has also referred to the descriptions by ancient writers of the Strait of Gibraltar indicating a width of around two kilometres. Unfortunately, he does not cite references(f). He also is sympathetic to the existence of an earlier landbridge at Gibraltar.
(a) https://de.academic.ru/dic.nsf/dewiki/1337738
(b) https://de.wikipedia.org/w/index.php?title=Stra%C3%9Fe_von_Gibraltar&oldid=60093153
(c) https://gibraltar-intro.blogspot.ie/2015/10/bc-pillars-of-hercules-if-ordinary.html
(d) The Formation of the Strait of Gibraltar (archive.org)
(e) https://www.migration-diffusion.info/article.php?id=514
(f) https://web.archive.org/web/20200630064033/http://freerepublic.com/focus/f-news/1011563/posts
(g) The Pillars of Hercules – Ancient World Magazine *