Leopold Jessner

Leopold Jessner (3 March 1878–13 December 1945) was a noted producer and director of German Expressionist theater and cinema. His first film, "Hintertreppe" (1921), is considered a major turning point which paved the way for the later German Expressionist experiments of German filmmakers F.W. Murnau, Fritz Lang, and G.W. Pabst.
A native of Königsberg, Jessner was a touring actor in his youth and turned to directing in 1911. He was director of the Berlin State Theater from 1919–1925 and was known for bare stages in which flights of steps served as different spaces for scenes and directing actors to act in an oversimplified, unnatural manner.
"Hintertreppe" (German for "Backstairs"), Jessner's first film (co-directed with Paul Leni), exemplified Jessner's use of heavily stylized staircases. These staircases would become regular fixtures in later German films, nicknamed "Jessnertreppe" in Jessner's honor, and would be used to full effect in the 1926 German Expressionist film "Faust", directed by F.W. Murnau. Jessner's direction is often considered heavy-handed and clumsy in regard to this picture, and critics accuse Jessner of forcing inappropriate theatrical conventions into the cinema.
As a Jew and a Socialist, he was forced to emigrate to the United States in 1933, after Adolf Hitler came to power in Germany. He worked in film anonymously in Los Angeles until his death.