The Triumph of the Will (1935)

This documentary by filmmaker Leni Riefenstahl's is about the Nazi party's 1934 rally in Nuremberg, Germany. Told without narration, it documents all six days of activities from Adolf Hitler's arrival to his departure. It includes speeches by all of the major participants as well as the various activities of the thousands upon thousands who attended. In hindsight, it's a chilling film that shows the power of propaganda.