Researchers Accidentally Discovered a Lost Archimedes Page Hidden Inside a French Museum Archive

A remarkable discovery has been made in the archives of a French museum, shedding new light on a lost page from the famous Archimedes Palimpsest. Researchers from the CNRS identified the manuscript after a chance search led them to a document that had apparently been sitting unnoticed for years in the collections of the Musée des Beaux-Arts in Blois.

The page contains hidden mathematical work by Archimedes beneath later religious writings. Experts confirmed the discovery by comparing the manuscript with photographs taken in 1906 by Danish scholar Johan Heiberg, whose images became a key reference after parts of the original palimpsest disappeared during the twentieth century.

The rediscovery of the Archimedes Palimpsest is significant because it is one of the rare surviving manuscripts connected directly to Archimedes, the Greek mathematician and inventor whose original texts were lost centuries ago. Historians have spent decades studying the document because it preserves writings that changed the history of mathematics.

A Chance Encounter Unveils a Forgotten Page

The story began with a lighthearted comment that was not meant to be taken seriously. Victor Gysembergh, a researcher at CNRS, joked with colleagues about searching for palimpsests in Blois, a city historically linked to French kings and aristocratic libraries. Then he checked the museum’s online catalog and stumbled upon something unusual.

One page featured an image of the prophet Daniel standing beside two lions, while the other side was covered with Greek writing. According to France 24, the illustration looked old but was actually added in the 1940s to make the manuscript appear more valuable, but the Greek text underneath was the real surprise.

As reported by a CNRS release, behind Byzantine prayers copied onto the parchment in 1229, Gysembergh noticed geometric figures and mathematical arguments linked to On the Sphere and Cylinder, one of Archimedes’s major works.

The text dealt with calculations related to the surface area of a sphere. The manuscript had become a palimpsest centuries earlier when a monk reused the parchment for religious texts, scraping away much of the original writing but not fully erasing it.

A Manuscript That Defied Time and Circumstance

The history of the Archimedes Palimpsest is already complex enough on its own. The manuscript contains several treatises by Archimedes along with speeches by Hypereides and commentary on Aristotle. As explained by the Archimedes Palimpsest Project, the texts were copied onto parchment in Constantinople around the fifth century after the original papyrus versions disappeared.

“The book [had] suffered greatly since the time when Heiberg saw it. Firstly, some pages are missing. The most important are three missing pages that once contained Archimedes text.”

The manuscript later survived the Crusades before reaching the monastery of St Sabbas in Palestine. In 1229, a Greek priest dismantled the manuscript and reused the parchment for a prayer book.

“Archimedes wrote his treatises on papyrus rolls, the originals of which have been lost,” explained Mary Miller, who worked on documentation linked to the manuscript for the Exploratorium.

The palimpsest disappeared during the conflict between Greece and Turkey and remained out of public view for decades before resurfacing at auction in 1998.

Century-old Photographs Unravel the Mystery

The newly identified page was authenticated using photographs taken by Johan Heiberg in 1906. Those images became incredibly valuable later because some pages he documented eventually vanished from the manuscript.

As mentioned in France 24report, Gysembergh said everything matched: the handwriting, the diagrams, and even the mistakes made by the original copyist. The page was identified as page 123 of the missing palimpsest.

“Until this discovery, we had no reason to hope we would ever find [the pages],” he said. “If institutions or private collectors have this kind of manuscript, they should think about whether it could be one of the other lost pages.”

The larger manuscript was sold through Christie’s in 1998 for around $2 million to an anonymous American collector. By that point, researchers already knew some leaves photographed earlier were no longer there. Scientists now hope to use multi-spectral imaging on the Blois page to reveal more of the hidden mathematical text underneath the prayers.