The Vinland Map

Summary

The Vinland Map is a world map on fifteenth-century parchment showing an island called Vinland west of Greenland, presented by Yale in 1965 as a pre-Columbian record of Norse America. In 2021 Yale announced that titanium from a twentieth-century pigment runs through every inked line, and declared it a forgery.

The parchment is genuinely old. The drawing is not. For half a century the map's defenders pointed to the first fact, and its critics to the second.

What is documented

The map. The Vinland Map is drawn on a parchment bifolium measuring 27.8 by 41.0 centimetres. It shows Europe, Africa and Asia and, in the north-west Atlantic, an island labelled Vinlanda Insula, with a legend describing "the Island of Vinland, discovered by Bjarni and Leif in company". It is associated with two genuine medieval manuscripts: part of the Speculum Historiale, the encyclopedia of Vincent of Beauvais, and the Tartar Relation, an account of a thirteenth-century journey into the Mongol lands. When it reached Yale it was bound, in a modern binding, inside the slim Tartar Relation; Yale acquired the Speculum volume afterwards. Matching wormholes indicated that the map had once stood at the front of the Speculum volume, probably drawn on one of its endleaves.

The unveiling. The collector Paul Mellon gave the map to Yale in 1965. That year Yale announced it with the book The Vinland Map and the Tartar Relation, by R. A. Skelton, Thomas Marston and George Painter, which argued that the map was drawn around the time of the Council of Basel, 1431 to 1449, half a century before Columbus.

The first chemistry. In the early 1970s Walter McCrone's laboratory in Chicago examined the ink and found anatase, a crystalline form of titanium dioxide that was not made commercially as a pigment until the twentieth century. McCrone concluded the map was a modern forgery and restated the case in Analytical Chemistry in 1988. In 1987 a team led by Thomas Cahill at the University of California, Davis, published measurements of the inks by particle-induced X-ray emission that found far less titanium, and questioned McCrone's conclusion. The disagreement kept the map's status open.

The inks, 2002. The chemists Katherine Brown and Robin Clark examined the map by Raman microprobe spectroscopy. The black line of every feature is carbon, laid over a yellow line that contains anatase. Medieval iron-gall ink tends to yellow at its edges as it ages; here the yellow is a separate line. They concluded that the combination "indicates that the VM is a modern forgery".

The parchment, 2002. D. J. Donahue, J. S. Olin and G. Harbottle radiocarbon-dated the parchment by accelerator mass spectrometry: AD 1434, plus or minus 11 years, at one sigma, and AD 1411 to 1468 at 95 per cent confidence. The parchment is medieval. The date says nothing about when the ink was put on it.

The source map. According to Raymond Clemens, the Beinecke's curator of early books and manuscripts, the historian John Paul Floyd found that the map is based not on Andrea Bianco's world map of 1436 but on a printed facsimile of it made in 1782, because it repeats mistakes found in the facsimile and nowhere else.

The 2021 study. Conservators and conservation scientists working with the Beinecke, among them Richard Hark, examined the map with X-ray fluorescence, Raman microscopy and scanning electron microscopy. They found titanium compounds throughout the map's lines and text, in anatase particles closely resembling a pigment produced commercially in Norway in 1923; Yale noted that the earliest commercial titanium-white pigments date from the 1920s. They also found that a Latin note on the back of the map, which ties it to the Speculum, had been overwritten in titanium-bearing ink. Yale announced the result on 1 September 2021. Clemens said: "The Vinland Map is a fake. There is no reasonable doubt here." Hark called the altered note "pretty strong evidence of a motive to deceive". The map remains at the Beinecke with the two manuscripts.

Leading explanations

A twentieth-century forgery on old parchment. Established. The ink contains a pigment that did not exist before the twentieth century, in every inked area. The yellow edging, which aged iron-gall ink would be expected to show, is a separately drawn line containing that pigment. The geography follows an eighteenth-century printed facsimile. The note that links the map to the Speculum was altered in modern ink. The only medieval component is the parchment, most likely an endleaf of the Speculum volume.

The forger. Unknown. The historian Kirsten Seaver proposed in 2004 that the map was made by Father Josef Fischer (1858 to 1944), a Jesuit scholar of early maps. This is a hypothesis without direct evidence and has been contested. Yale's 2021 announcement did not name a forger.

Authentic, with contaminated or misread ink. Rejected. Before 2021 the map's defenders argued that the titanium was a trace impurity or that the testing was unrepresentative. Titanium in every inked area, a yellow line drawn separately from the black, and an inscription altered in the same modern ink leave that position without support.

Current status

Debunked. The Vinland Map is a twentieth-century drawing on a fifteenth-century leaf. The finding rests on four independent lines: the pigment, the structure of the ink lines, the cartographic source and the altered inscription. What remains unknown is who made it and when in the twentieth century. Documentary evidence identifying the forger would add to the record; it would not change the finding.

Last reviewed: September 2026. Records are provisional. Where the evidence changes, the entry changes. Found an error? Tell us.