Polish President Karol Nawrocki rescinded his country’s highest civilian award from Ukrainian President Volodymyr Zelensky on Saturday. Why? On May 26, Zelensky honored Ukrainian nationalist fighters whom Poland has long held responsible for killing tens of thousands of Poles in 1943. Kyiv, for its part, remembers them as fighting the Soviet Union. The two countries remain allies…

It’s not known whether these works were among the hundreds of thousands that the Nazis looted – especially from Jews – during their time in power, but in displaying these pieces, the museum hopes that the public can identify their original owners. Perhaps the most famous lost painting of this kind was Gustav Klimt ’s “The Woman in Gold”, which was rediscovered in 2006. It now hangs in New…