"The Tale of the Fox" - Ladislas Starevitch

Perhaps the most beautiful stop motion animation ever made : "Le Roman de Renard" ("The Tale of the Fox") by Ladislas Starevitch, a Russian living in France after the Soviet revolution.
Although most of the film was made in Paris from 1929-1931, Ladislas, with his wife and daughter, continued to work on it for years, waiting for sound in the cinema so they could make a soundtrack. It was finally released in Berlin in 1937 and in France in 1941.