Compositions   1924: Piano Concerto 1924: Das Marienleben 1930: Concert Music for Strings and Brass 1934: Mathis der Maler Symphony 1939: Violin Concerto 1943: Symphonic Metamorphoses on Weber 1947: Symphonia Serena 1950: Requiem for Those We Love 1951: Der Harmonie der Welt Symphony	World Politics 1914: First World War     1929: Wall Street Crash   1939: Second World War     1949: Mao declares Chinese Republic   1961: Berlin Wall built