Gustave Courbet, “The Stone Breakers”, 1849 – destroyed during World War II when a transport vehicle moving the pictures to the castle of Königstein, near Dresden, was bombed by Allied forces in February 1945.
Vincent van Gogh, “Painter on His Way to Work”, 1888 – lost by fire under Allied bomb attack on the town of Magdeburg.
Gustav Klimt, Portrait of Trude Steiner, 1900 – taken by the Nazis after Jenny Stenier (a Viennese collector) escaped from Austria in 1938. It was consequently sold to an unknown person in 1941 and was never seen since then.
Rembrandt van Rijn, “An Angel with Titus’ Features” – stored in a French countryside chateau before the Nazis took it with them to Paris in 1943. There, it was set aside to be installed in Hitler’s museum along with 332 other artworks. 162 of those pieces were found since but no leads for this one.
Canaletto, Piazza Santa Margherita – was part of Jacques Goudstikker’s private collection which the Nazis seized and purged after he fled to the Netherlands in 1940 and was never seen again.
Edgar Degas, Five Dancing Women – the Nazis got hold of this pastel work by Degas when they took Baron Mór Lipót Herzog’s collection. This work is supposed to be lost.
Raphael, Portrait of a Young Man, 1513/14 – was taken from the Czartoryski’s family collection in Krakow. Rumors suggest it was found somewhere – lately in a Swiss bank vault.