Return of the Mona Lisa at the end of World War Two. --- On the eve of war, curators at the Louvre swathed the museum's most priceless painting in layers of waterproof paper, boxed it up and spirited it to the French countryside for safekeeping. The painting was moved another five times during the war before she was safely returned to the Louvre after the Liberation.
Josephine Baker in her World War II Uniform, c. 1945. During World War II, she worked with the French resistance movement. Using her career as a cover, Baker carried secret messages written in invisible ink on her sheet music!!