The Musee d'Orsay in Paris today opened a new permanent exhibition of suspected Nazi loot.
A dozen paintings, including work by Edgar Degas and another attributed to Paul Cezanne, and a sculpture are the first exhibits in the gallery called To Whom Do These Works Belong?
The museum has set up a team of investigators who will spend the next three years trying to answer that question and hopes the permanent show will encourage claimants to come forward.
It has returned 15 stolen works in the last 30 years but still holds 225 artworks that may have been looted by the Nazis and hopes the publicity around the new exhibition may help fill in some of the historical gaps preventing their restitution.
A spokesperson for the museum said it hoped the gallery would be a "space for memory, transparency, and active research".
The opening comes shortly after the announcement the Zurich-based SKKG Foundation has returned
a Swiss landscape by Ferdinand Hodler to the heirs of Jewish collector Martha Nathan.
It said the work would be restituted after an independent commission concluded she had been forced to sell it by the Nazi regime.