The Palace of Versailles. Photo: Sandrine Marty / Hans Lucas via Reuters Connect

The Palace of Versailles said it will conduct further research into the origins of a sketchbook owned by French painter Jacques-Louis David after a recent investigation revealed that it was stolen by the Nazis during World War II before joining France’s national collection.

Radio France said on Monday that it launched an investigation into the provenance of the prized sketchbook after being contacted by a descendant of its original owner. The broadcaster said just “a few weeks” later, it had compiled enough evidence to support the descendant’s claim about the sketchbook being looted by the Nazis during the war.

The evidence relies on public data accessible online, such as diplomatic archives and the French Holocaust Memorial’s database of Nazi-stolen property. France’s Ministry of Culture admitted that both the ministry and the Palace of Versailles did not know the sketchbook was stolen by Nazis during World War II, but they vowed to “continue research on this notebook and have discussions with the descendants of the owners.”

The Ministry of Culture told Radio France that in the Palace of Versailles, a team of three people are “actively working and reviewing works in the collections to verify their provenance” but the team “had not yet examined this notebook.”

A relative of the sketchbook’s original owner told Radio France he was shocked when he discovered by chance that the Nazi-looted sketchbook was a part of the collection at Versailles. “It’s a key work by David, and the Palace of Versailles does a lot of publicity around these notebooks … So, I’m very surprised that there isn’t more research into their provenance,” he said. “At the moment, there are 100 police officers looking for jewels stolen from the Louvre while to return the works stolen – and there are many at the Louvre and other museums – I find that the means are very, very low.”

The sketchbook dates back to 1790 and includes drawings, sketches, and notes related to one of David’s most famous works, “The Tennis Court Oath” (1790), a painting about the French Revolution that was never finished. The painting belongs to the Palace of Versailles but is currently on display in the Louvre as part of its limited time exhibition that celebrates the 200th anniversary of David’s death. The sketchbook is not part of the exhibit.

German Nazi soldiers stole an entire library, including David’s sketchbook, from Professor Lereboullet in July 1940 when they occupied his home. Lereboullet’s daughter Odile reported the theft in November 1945 to the Commission for Art Recovery (CRA), a French public body responsible for recovering and returning looted pieces of art to their rightful owners or their heirs. She never received a response from the CRA. The sketchbook reappeared in January 1943, when it was sold at auction by the Karl & Faber art gallery in Munich, Germany. It came into the possession of German Jewish art dealer and art historian Otto Wertheimer. A former German professor of art history and curator at the National Museum in Berlin, Wertheimer himself fled Nazi persecution and settled in Paris in 1944. He became a well-known art dealer who provided museums with masterpieces and missing pieces of European art. He sold the David sketchbook to the Palace of Versailles in 1951.

The Palace of Versailles has previously returned only one Nazi-looted item to its original owners: a small Louis XVI era writing table that was returned in 1999.