Crystal Palace, London, Hyde Park, Great Exhibition of 1851, Industrial Revolution, Joseph Paxton, cast iron and glass construction, Bill Mauldin, cartoonist, early cartoons, WWII army life, Louise Brooks, silent movie film star, Canary Murder Case, William Powell, movie, Marlene Dietrich, actress, The Blue Angel, Weimar Culture, KPD Poster, SPD Poster, photo document, Berlin May Day arrest, A-I-Z