Courtesy of Wolfram Aïchele: Photo 1, Photo 2, Photo 3, Photo 4, Photo 5, Photo 6, Photo 7, Photo 8, Photo 9, Photo 10, Photo 11, Photo 12, Photo 13, Photo 17, Photo 20, Photo 18, Photo 33, Photo 25 Photo 41. AKG-Images: Photo 14/Bildarchiv Pisarek, Photo 26 Photo 27/Ullstein Bild, Photo 30, Photo 32, Photo 34/Ullstein Bild, Photo 35. Bildarchiv Preussischer Kulturbesitz: Photo 29. Corbis/Bettmann: Photo 39. Getty Images: Photo 16/Time & Life Pictures, Photo 23, Photo 24, Photo 36, Photo 37, Photo 38/Time & Life Pictures. Courtesy of Peter Rodi: Photo 19. Schoeningh & Co., Luebeck: Photo 15. Stadtarchiv Pforzheim – Institut für Stadtgeschichte: Photo 21, Photo 22 Photo 28, Photo 31, Photo 40.