A piece of lost German artwork stolen during World War II, recovered last year (AP/Michael Sohn)A Czech historian has discovered a long-lost collection of paintings belonging to Adolf Hitler. The Telegraph reports that the unearthed works of art include a "massive" painting entitled "Memories of Stalingrad." Even though the battle of Stalingrad was one of the German army's most brutal defeats in World War II, the painting is said to have been one of Hitler's favorites.