A new permanent gallery at the Musée d’Orsay is drawing renewed attention to one of Europe’s longest-running cultural and historical reckonings: what to do with thousands of artworks looted, displaced or sold under duress during the Nazi era that still have no identified rightful owners.The space, titled “À qui appartiennent ces œuvres ? / Who Do These Works Belong To?”, showcases works from France’s national “MNR” collection (Musées Nationaux Récupération) — artworks recovered after World War II but never successfully restituted. These pieces remain in state custody while provenance research continues, sometimes decades after their recovery. According to the museum,...