The Piri Reis World Map of 1513

A fragment of a world map drawn at Gallipoli in the spring of 1513 by the Ottoman corsair-turned-admiral Piri Reis, on gazelle-skin parchment, showing the Atlantic coasts of Europe and Africa and the newly reported shores of the Americas. Piri Reis names his sources on the sheet itself: some twenty older charts and mappae mundi, Portuguese charts of Asia, an Arabic map of India, and, he says, a map made by Christopher Columbus. Presented to Sultan Selim I in Cairo in 1517, it then disappears from the historical record for four centuries.

It resurfaced in the Topkapi Palace library in 1929, identified by the German theologian Gustav Adolf Deissmann and the orientalist Paul Kahle. Since the 1960s it has also carried a persistent pseudo-archaeological claim, that its southern coastline shows an ice-free Antarctica proving access to lost ancient survey data. Historians of cartography reject this: the disputed coastline reads as a distorted, bent extension of South America, a common convention on maps of the period, and the claim rests on methodology that a geologist reviewer has shown conflates subglacial rock beneath Antarctica's ice with a hypothetical ice-free surface.

Roughly two thirds of the original sheet is lost, apparently to moisture damage before or shortly after it reached the palace library. What survives is extremely light-sensitive and is shown only rarely, most recently returned to a climate-controlled case at Topkapi in November 2021. It was inscribed on UNESCO's Memory of the World International Register in 2016.

What survives, and what it does not

The object in the Topkapi Palace Library today is a single sheet of gazelle-skin parchment, painted in eight colors, measuring 87 centimeters along its top edge and narrowing to 41 centimeters at the bottom, a trapezoid rather than a rectangle because two of its four sides are simply gone. Turkey's own 2016 nomination to UNESCO's Memory of the World register states that the eastern portion of the map is completely missing and the southern fragment is partially distorted, and attributes the loss to prolonged exposure to moisture rather than to any single dramatic event.

What survives is generally held to be about one third of the whole sheet: the western coasts of Europe and Africa, the Atlantic, and the eastern coastline of the Americas as they were understood in 1513. A recent reconstruction cited in the same nomination estimates the complete map, had it survived whole, at roughly 140 by 165 centimeters. The surviving fragment carries two thirty-two-point compass roses in its north and south sections, three smaller ones, and red and black rhumb lines covering the surface in the standard manner of a portolan chart; the spacing of the surviving roses implies a total of seventeen across the original sheet.

How it was compiled

Piri Reis did not claim to have surveyed any of this himself. His own inscription lists his sources in specific terms: about twenty older charts and mappae mundi going back, he says, to the era of Alexander the Great, which the Arabs call Jaferiye; eight of that Jaferiye type in particular; one Arabic map of India; four newly drawn Portuguese maps showing India, Sind and China; and, for the western lands, a map by Colombo. Counted item by item across the inscription the total comes to thirty-four individual source maps, though the figure of twenty is the one usually quoted, referring to the core group of old mappae mundi rather than the full list.

The colophon, written in Arabic in a different hand from the rest of the inscriptions, is where the Columbus material is described most fully: a book, it says, fell into the hands of the said Colombo, describing lands at the end of the Western Sea, and Colombo used it to persuade the great of Genoa to give him ships. Piri Reis's own account of how he came by Columbus material is more specific still: he says he learned of Columbus's voyages from a slave or servant of his uncle Kemal Reis, a man who had reportedly sailed with Columbus's Spanish expeditions three times.

A corsair's nephew becomes a cartographer

Piri Reis was born Muhiddin Piri at Gallipoli, an Ottoman naval base, sometime around 1465 to 1470, the son of Haci Mehmed. From roughly 1487 he sailed as a corsair alongside his uncle Kemal Reis, raiding Spanish and French coasts and Mediterranean islands in support of the Emirate of Granada, in the fluid zone between piracy and formal service that also produced many of the Ottoman navy's admirals. After the fall of Granada in 1492 the two ferried Muslim and Jewish refugees from Spain to North Africa on the sultan's instructions, and both were eventually absorbed into the regular Ottoman navy under Bayezid II.

Kemal Reis drowned at sea in 1510 or 1511, in circumstances Piri Reis himself recorded only briefly, though a Venetian report at the time alleged that a rival had sent him out in an unsound ship. After his uncle's death Piri Reis returned to Gallipoli and turned from corsairing toward cartography and writing, a shift that produced both the 1513 map and, later, his navigational atlas of the Mediterranean, the Kitab-i Bahriye.

The gift to Selim I

Piri Reis presented the finished map to Sultan Selim I in Cairo in 1517, during the campaign that completed the Ottoman conquest of Mamluk Egypt. The decoration on the surviving portion is fine enough that historians take it as a work made deliberately to be presented, not a working chart for shipboard use, and the presentation fits a broader pattern in which command of geographic intelligence, at a moment when the Ottoman state was expanding into the Indian Ocean and needed to understand Portuguese and Spanish activity in the Atlantic, was itself a form of service to the sultan.

What Selim I made of the gift, if anything, is not recorded. No inventory entry, correspondence or later reference documents its reception, use, or storage between 1517 and its rediscovery four centuries later. That silence is itself informative: an object this elaborate, presented to a sultan personally, still generated no surviving paper trail for four hundred years.

Wonders at the edge of the known world

The surviving fragment carries fifty-eight illustrations: eleven vessels, eight human figures, three ruler portraits in national dress, eighteen fortresses and fortified towns, twelve parrots, and fourteen animals and mythological or semi-mythological creatures, including figures drawn from the classical and medieval tradition of monstrous races said to inhabit the edges of the world. A 2016 study by the zoologists Marco Masseti and Cecilia Veracini, published in Anthropozoologica, examined these zoomorphic images specifically and found that most conform to the established European and Near Eastern late-medieval iconographic tradition, the same tradition Piri Reis names when he cites old mappae mundi among his sources.

The same study found a partial exception: the Caribbean parrots do not match any earlier known source and, the authors argue, could have been copied from the lost Columbus map itself, meaning they may be among the few images on the sheet that carry first-hand New World observation rather than inherited convention. That is an argued reading, not a documented one; no independent copy of Piri Reis's Columbus source survives to confirm it. Read together, the map's imagery is not a private symbolic program but an inherited visual vocabulary for describing unmapped space, applied by a working naval officer compiling the best charts available to him, with at least one apparent departure where a genuinely new report broke the pattern.

Four centuries unaccounted for

Between the 1517 presentation and the map's twentieth-century rediscovery, nothing is documented. It must have remained somewhere within the Ottoman palace libraries, since that is where it eventually turned up, but which library, in whose custody, and whether anyone consulted it in the intervening four hundred years is simply not known. The physical damage that removed two thirds of the sheet, attributed by conservators to moisture rather than to fire, war or deliberate destruction, could in principle have happened at almost any point in that span.

This is the largest single gap in the object's history, larger in proportion to its known life than the seven-century gap in the provenance of some paintings, because here there is not even a plausible private owner to name. The map was state property before the gap and state property after it; only the intervening custody is missing.

Deissmann's find

The map's return to view did not happen in a single dramatic moment. According to Turkey's own 2016 account submitted to UNESCO, it first came to light in 1924, when the museum director Halil Edhem (later Halil Edhem Eldem) was working to consolidate the various libraries scattered through the Topkapi Palace as part of its conversion from imperial residence to public museum. It was identified and dated five years later: the German theologian and orientalist Gustav Adolf Deissmann, invited by the Turkish Ministry of Education to catalogue the palace library's non-Islamic holdings, was studying manuscripts and maps there in 1929 when he recognized the significance of the sheet Edhem had set aside. Deissmann brought in the orientalist Paul Kahle, who had already published a German translation of Piri Reis's Kitab-i Bahriye and so knew independently that Piri Reis had made a world map in his lifetime.

Kahle examined the sheet under special palace permission and published the first facsimile in 1931, followed two years later by a detailed booklet and article. The geographer Eugen Oberhummer published his own study the same year, and in 1932 Yusuf Akcura wrote it up for the Turkish Historical Society in the Illustrated London News, carrying the discovery to a wider European audience. Turkey's first president, Mustafa Kemal Ataturk, took a personal interest and ordered facsimiles made. No researcher has since disputed the map's authenticity or its attribution to Piri Reis.

Piri Reis after the map

The map was an early achievement in a long career. Piri Reis went on to write the Kitab-i Bahriye, a portolan atlas of the Mediterranean, in a first version of 130 chapters presented to the newly enthroned Suleyman the Magnificent in 1521, and an expanded 210-chapter version in 1526 commissioned by the grand vizier Pargali Ibrahim Pasha. He rose to become Hind Kapudani, admiral of the Ottoman fleet in the Indian Ocean, based at Suez, selling his properties in Constantinople in a move his biographers read as a sign he did not expect to return. He led the Ottoman capture of Aden in 1548 and of Muscat in 1552.

His last campaign, in 1552, was an attempt to take the Portuguese-held fortress of Hormuz at the mouth of the Persian Gulf. The siege stalled when gunpowder ran short and the governor of Basra refused to resupply him; Piri Reis lifted the siege in October and withdrew into the Gulf with a large quantity of plunder taken at Hormuz and Qeshm, but without rowers for his galleys, which the Basra governor, Kubad Pasha, also refused to provide. Kubad Pasha reported him to Istanbul for misconduct, and accounts differ on whether the specific charge was bribery by the Portuguese to lift the siege or simple rivalry over the plunder. Piri Reis was arrested once he reached Egypt and beheaded in Cairo, on the sultan's order, in December 1553, an old man by the standards of the time, not far short of ninety years old.

The Columbus question: what is actually established

What is documented is narrow and specific: Piri Reis's own inscription names a map by Colombo among his sources, and separately describes, through his uncle's associate, how Columbus came to seek the western lands in the first place. What is not documented is any independent trace of that Columbus source map. No copy of it, by Columbus's hand or anyone else's, survives outside what Piri Reis says he took from it.

Gregory McIntosh's 2000 study, the standard modern monograph on the map, argues the case is nonetheless credible on internal evidence: the map's depiction of Cuba as part of the Asian mainland matches Columbus's own documented, mistaken belief, and McIntosh reads the primitiveness of the New World coastline on the Piri Reis sheet, compared with slightly later Portuguese-derived maps, as consistent with an early Columbus-circle source, most likely a chart from Columbus's second voyage of 1493 to 1496 rather than his third. That is an argued position, made by a named scholar on stated evidence, not a documented fact; it rests on internal comparison rather than on a surviving independent copy of the source itself, and this record treats it as argued accordingly.

The Antarctica claim, and why historians reject it

The civil engineer and amateur archaeologist Arlington H. Mallery first proposed, in the 1950s, that the southern landmass on the Piri Reis map represented part of Antarctica's coast as it looked before the present ice cap formed. Charles Hapgood, a history professor, took the idea much further in his 1966 book Maps of the Ancient Sea Kings, arguing that the coastline matched Queen Maud Land with what he called seismic accuracy, and that this proved the map drew on a lost, far older survey made by a vanished advanced civilization. In 1960 a US Air Force officer, Lieutenant Colonel Harold Z. Ohlmeyer of the 8th Reconnaissance Technical Squadron, wrote to Hapgood that the identification with the Princess Martha Coast of Queen Maud Land was reasonable; that single letter has circulated in popular accounts ever since as an official government endorsement of Hapgood's theory.

Historians of cartography reject the identification, reading the disputed coastline instead as a distorted, southward-bending extension of the South American coast, drawn to fit the remaining space on an expensive parchment sheet and reflecting the conventional expectation, inherited from the ancient Greeks and current among sixteenth-century geographers, that a Terra Australis balanced the northern landmasses. Gregory McIntosh's study finds little basis for the Antarctica reading beyond the coincidence that Piri Reis drew some southern land, and Antarctica is also south. A detailed critique published in Aramco World in 1980 by Paul Hoye and Paul Lunde points out specific problems with the fit: the hypothesized ancient surveyors are supposed to have omitted the Strait of Magellan and Cape Horn entirely, and to have lost some nine hundred miles of coastline, while the section reads much more naturally as the east coast of South America if the sheet is simply read with that section rotated to run north-south rather than treated as an independent southern continent.

The geologist Paul V. Heinrich has identified the specific methodological flaw underlying both Hapgood's and Ohlmeyer's readings: they compare Piri Reis's coastline to modern seismic maps of the rock surface beneath Antarctica's ice sheet, not to any plausible ice-free coastline, without accounting for isostatic rebound, the fact that ice-free bedrock would sit meters to hundreds of meters higher than rock currently depressed under the weight of the ice cap. Heinrich also notes the comparison rests on a single seismic survey line, not a systematic coastal survey. Separately, Antarctica's ice sheet is now understood to be millions of years old, not thousands, closing off the version of the claim that imagines human observers recording an ice-free coast within historical or even Neolithic memory. The absence of a lost ancient survey behind this section of the map is, on the evidence available, the finding, not an open question.

Custody, display and conservation since 1929

Since its rediscovery the map has remained Turkish state property, held by the Topkapi Palace Museum Library, and it is treated as one of the museum's most sensitive objects. Turkey's 2016 UNESCO submission states plainly that the sheet is not on permanent display because it is sensitive to light, and that it is shown only on special occasions, with exhibition periods set by the museum's National Palaces Science Board. Researchers may be granted digital images of the map with the museum's permission, but not routine access to the original.

It has traveled abroad only rarely: the Topkapi Palace Museum's director has stated that the map was exhibited overseas twice in the United States and twice in Europe between 1966 and 1988, without naming the specific venues or dates in the sources consulted here. It was displayed at Topkapi itself for the UNESCO-designated Piri Reis Year in 2013, marking the map's five hundredth anniversary, in an exhibition running from 23 January to 11 February that year and accompanied by an international symposium on Piri Reis and Ottoman maritime history. UNESCO inscribed the map on its Memory of the World International Register in 2016. It was returned to public display at Topkapi on 19 November 2021, placed in a climate-controlled case in the Sultan Ahmed III, or Enderun, Library in the palace's Third Courtyard.

What the record does not resolve

This map has generated an unusual amount of speculation precisely because so much of its own history is genuinely undocumented, not because the documented parts are ambiguous. The parts that are established are established firmly: the maker, the date, the presentation to Selim I, the 1929 identification, the custody since. The parts that are open, the four-century gap, the exact fate of the missing two thirds, the true nature of the Columbus source, are open because nothing was written down, not because a case can be argued either way. A record that filled those gaps with a plausible story would be worth less than this one, which states them as gaps.