The Piri Reis map is a world map drawn in 1513 by the Ottoman admiral and cartographer Piri Reis on gazelle-skin parchment, of which only the western third survives. It shows the Atlantic Ocean with the coasts of southwestern Europe, West Africa, the Caribbean and South America, and it is one of the earliest surviving maps to show the New World, partly copied from a lost chart by Christopher Columbus. Since the 1950s it has also been read by some writers as a picture of an ice-free Antarctica, a claim mainstream historians of cartography reject.
The map matters for two reasons that pull in different directions. For historians, it is a rare window into how news of Columbus's voyages travelled into the Ottoman world within a generation, and a possible copy of a Columbus map that no longer exists. For readers of alternative history, it became the founding exhibit for the idea that someone mapped the far south long before 1820, and it still anchors debates about lost civilizations, ancient sea power and the end of the last ice age. Understanding both readings starts with what is physically on the parchment.
Who was Piri Reis
Piri Reis was an Ottoman naval officer, born Muhiddin Piri around 1465 to 1470 in Gelibolu (Gallipoli), who learned seafaring under his uncle, the corsair-turned-admiral Kemal Reis. "Reis" is a rank, roughly equivalent to captain. He sailed the Mediterranean for decades and later led Ottoman naval campaigns in the Indian Ocean.
He is best known today for two works. The first is the 1513 world map. The second is the Kitab-ı Bahriye, or Book of the Sea, a detailed sailing guide to the coasts, harbours and islands of the Mediterranean, first completed in 1521 and expanded into a revised edition presented to Sultan Suleiman the Magnificent by 1526. He drew a second world map in 1528, of which only the northwestern corner survives. His career ended badly: after a failed campaign against the Portuguese at Hormuz, he was executed in Cairo in 1553.
What the Piri Reis map actually shows
The surviving fragment shows the Atlantic Ocean as a working navigator's chart, with the Old World on the right and the New World on the left. The parchment measures about 87 centimetres long and 63 centimetres wide at the top, narrowing toward the bottom, according to the Topkapı Palace Museum's own description submitted to UNESCO's Memory of the World register. It is painted in colour and covered with notes in Ottoman Turkish.
On the right edge are the Iberian Peninsula and the bulge of West Africa. In the middle are Atlantic island groups. On the left are Caribbean islands, including Hispaniola and Cuba, and below them the eastern coast of South America, recognisably the coast of Brazil. Along the bottom edge, the coastline does something unusual: it turns sharply east and runs along the foot of the parchment, decorated with drawings of animals and notes about the land.
Technically, the map is a portolan chart. Portolans were the navigation charts of medieval and early modern Mediterranean sailors, built around compass roses with radiating lines of bearing (rhumb lines) rather than a grid of latitude and longitude. They were designed for dead reckoning, so coastlines were plotted by direction and estimated distance, and distortions of scale and orientation were normal. That background is essential to reading the southern coastline.
Where the map came from
Piri Reis tells us his sources directly in a long inscription on the map. He says he compiled it from about twenty older charts and mappae mundi, eight maps of the kind made in the time of Alexander the Great (the Ptolemaic tradition), an Arab map of India, four recent Portuguese maps of the Indian and Asian coasts, and a map by Christopher Columbus of the western lands.
The map itself spent centuries out of sight. It came to light in 1929, when Topkapı Palace in Istanbul was being converted into a museum. Museum director Halil Edhem and the German theologian Gustav Adolf Deissmann brought the fragment to scholarly attention, and the orientalist Paul Kahle published the first detailed study of it in 1931. Kahle's interest, and that of most scholars since, centred on the Columbus connection: if Piri really copied a Columbus chart, the map preserves cartography that has otherwise been lost.
The most thorough modern study is Gregory C. McIntosh's The Piri Reis Map of 1513 (University of Georgia Press, 2000), which translated every inscription and analysed the place names island by island. McIntosh concluded that many of the map's distinctive features support Piri's statement that he copied a Columbus map, and dated that source to around 1495 or 1496, during or just after Columbus's second voyage.
Where the Antarctica claim comes from
The Antarctica reading began with Captain Arlington H. Mallery, an amateur researcher, who proposed in 1956 that the southern coastline was the coast of Antarctica as it would look without ice. His idea reached a wider audience through a Georgetown University Forum radio broadcast that August on new and old discoveries in Antarctica and the Piri Reis map.
Charles Hapgood, a history of science teacher at Keene State College in New Hampshire, took up Mallery's suggestion and built it into a full theory. His book Maps of the Ancient Sea Kings (1966) argued that the Piri Reis map, along with a world map by the French mathematician Oronce Finé and other Renaissance charts, descended from source maps drawn by an advanced, globe-spanning seafaring culture during a period when parts of Antarctica were free of ice. Hapgood connected this to his earlier theory of earth crustal displacement, set out in Earth's Shifting Crust (1958), a book that carried a foreword by Albert Einstein.
The most quoted piece of support in Hapgood's book is a letter dated 6 July 1960 from Lieutenant Colonel Harold Z. Ohlmeyer of the US Air Force at Westover Air Force Base. Ohlmeyer wrote that "the geographical detail shown in the lower part of the map agrees very remarkably with the results of the seismic profile made across the top of the ice-cap," and that identifying the coast with Queen Maud Land's Princess Martha Coast and the Palmer Peninsula seemed the most logical interpretation. Later writers, most influentially Graham Hancock in Fingerprints of the Gods (1995), opened their arguments for a lost Ice Age civilization with the Piri Reis map and the Ohlmeyer letter, which is how the claim reached millions of readers and documentary viewers.
What mainstream historians say about the southern coast
The mainstream reading is that the southern landmass is not Antarctica but a blend of the coast of South America and the imagined southern continent, Terra Australis, that European and classical geographers had placed at the bottom of the world since antiquity. The UNESCO nomination describes the map as among the earliest to show Terra Australis, and McIntosh points out that Piri's own inscriptions on that southern land describe it in terms drawn from that tradition and from reports of Portuguese voyages.
Critics raise several specific problems with the Antarctic identification:
- The shape does not match. McIntosh's assessment is that there is little or no resemblance between Piri's southern land and Antarctica beyond both lying south of the Atlantic. Making them line up required Hapgood to adjust scales, rotate sections and redraw landforms.
- Bending a coast to fit the page was common practice. The South American coastline curves exactly where the parchment runs out, and portolan makers routinely turned a coastline to fit the surface available rather than leave it off the chart.
- There is no Drake Passage. On the map the southern land continues directly from South America, while the real Antarctic Peninsula is separated from Cape Horn by hundreds of miles of open sea.
- The ice is far older than people. Geologists date the East Antarctic ice sheet in some form to millions of years ago, long before any human seafarers, so an ice-free Queen Maud Land coast in human times would conflict with the geological record.
- The seismic comparison is not a survey. The Ohlmeyer letter was an informal assessment by Air Force cartographers working in their off-duty hours, not a peer-reviewed study, and matching a hand-drawn coastline to one seismic profile cannot rule out coincidence.
Antarctica itself was first sighted by European expeditions in January 1820, by the Russian voyage of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev and, days later, by the British naval officer Edward Bransfield. Mainstream historians see no evidence that anyone charted its coast before then.
Why the map still fascinates
The Piri Reis map endures because it sits where documented history meets open questions. Its documented story is already remarkable: an Ottoman captain assembling Portuguese, Arab, Greek and Columbian sources into one chart barely two decades after 1492. Its open questions, especially the lost source maps Piri says he used, invite people to ask what else those charts contained.
It also belongs to a family of artifacts that resist easy explanation and attract competing theories, alongside the Voynich manuscript and Plato's account of Atlantis. Supporters of the Antarctic reading often link it to the end of the last ice age and to the Younger Dryas impact hypothesis, which proposes a cosmic event around 12,800 years ago. Each of those debates has its own evidence for and against, and the map does not settle any of them on its own.
Billy Carson's reading
Billy Carson approaches the Piri Reis map as one piece of a larger argument: that human civilization is older and more complex than the standard timeline allows, and that ancient maps, myths and texts may preserve fragments of knowledge from earlier cultures. In his 4BK TV series Secrets of Antarctica, Carson treats the map as evidence that an earlier seafaring civilization charted an ice-free Antarctic coast, with Piri Reis inheriting that knowledge secondhand through the older source maps he describes in his own notes.
For Carson, the fact that Antarctica remains one of the least explored places on Earth is a reason to keep asking questions rather than close them. He places these questions inside the wider framework he explores in his Compendium of the Emerald Tablets and across the Anunnaki topic hub, where advanced beings and lost cultures shaped humanity's early history. These are his interpretations, and the editorial team presents them as such: the mainstream case summarised above remains the consensus view, and readers can weigh both. His full treatment of the continent, the map and the hidden-history readings is set out in the Secrets of Antarctica pillar.
Watch, read and go deeper
Billy Carson's Secrets of Antarctica series on 4BK TV walks through the Piri Reis map and the wider mysteries of the southern continent in his own words. For a written companion covering the continent's exploration history alongside his reading, start with the Antarctica and Piri Reis pillar. To place the map in Carson's broader account of ancient history and the Anunnaki, browse the Anunnaki topic hub.
Frequently asked questions
Does the Piri Reis map show Antarctica?
Mainstream historians of cartography say no. The southern coastline is generally read as South America's coast turned east to fit the parchment, combined with the imagined southern continent Terra Australis that appears on many maps of the period. The Antarctic reading was proposed by Arlington Mallery in 1956 and popularised by Charles Hapgood in 1966, and it remains a minority view.
Where is the Piri Reis map today?
The original fragment is held in the library of the Topkapı Palace Museum in Istanbul, where it was rediscovered in 1929. The map is listed on UNESCO's Memory of the World register as part of Turkey's documentary heritage.
What sources did Piri Reis use?
According to his own inscription, Piri Reis compiled the map from about twenty older charts and world maps, eight maps in the Ptolemaic tradition, an Arab map of India, four Portuguese maps of Asia and a map by Christopher Columbus. None of those source maps is known to survive. Scholars consider the Columbus source the most valuable, because it may preserve a lost chart from Columbus's second voyage.
Why is the Piri Reis map important if it does not show Antarctica?
It is one of the oldest surviving maps to show the Americas, and it may be the only surviving trace of a map drawn by or for Columbus. It also shows how quickly news of the Atlantic voyages reached Ottoman navigators. Gregory McIntosh's 2000 study treats it as one of the most significant maps of the Age of Discovery for those reasons alone.
What is the Kitab-ı Bahriye?
The Kitab-ı Bahriye, or Book of the Sea, is Piri Reis's sailing guide to the Mediterranean, first completed in 1521 and revised for presentation to Sultan Suleiman the Magnificent by 1526. It describes coasts, harbours, islands and navigation hazards, with detailed charts. It shows that Piri Reis was a practising navigator and cartographer working in the portolan tradition.
Sources and further reading
- Gregory C. McIntosh, The Piri Reis Map of 1513 (University of Georgia Press, 2000)
- Charles H. Hapgood, Maps of the Ancient Sea Kings: Evidence of Advanced Civilization in the Ice Age (1966)
- Topkapı Palace Museum, nomination of the Piri Reis World Map (1513) to the UNESCO Memory of the World Register
- Piri Reis, Kitab-ı Bahriye (Book of the Sea), 1521 and 1526 editions
- Graham Hancock, Fingerprints of the Gods (1995)
