Updated on Aug. 6 at 8:06 a.m. ET
In April 1945, Madame Roos wrote a letter to French authorities describing her piano she was hoping to get back. Roos, who was 72, was Jewish and her piano had been stolen when Nazis emptied her apartment in Paris.
A similar fate befell many of the 75,000 French Jews deported to concentration camps during World War II.