 Hailed as a work of genius, it is a pivotal film in the development of German cinema and Hollywood.The film features the talents of Curt Siodmak (story), Fred Zinnemann (cinematography) and Eugen Schüfftan, who had developed the Schüfftan process for three years earlier.The film is subtitled "a film without actors" and was filmed on Sundays in the summer of 1929.