Their fathers saved a priceless Dutch art collection from the Nazis

In the final months of the Second World War, in an underground cavern close to the German front, Dutch art curator Willy Auping would, by lamplight, unveil priceless works of art to a rapt audience of doctors and nurses who were enduring the bitter, final days of the war together.
The underground bunker where the paintings were hidden was in the Netherlands on the grounds of the Kröller-Müller Museum. The museum had been turned into a Red Cross hospital after the nearby city of Arnhem