From en.wikipedia.org: Metropolis is a silent science fiction film created by the famed Austrian-German director Fritz Lang. It was produced in Germany in the Babelsberg Studios and released in 1927 during the height of the Weimar Republic. In addition, it was the most expensive silent film of the time, costing approximately 7 million Reichsmark (equivalent to around $200 million in 2005) to make.
The screenplay was written in 1924 by Lang and his wife, Thea von Harbou, and novelized by von Harbou in 1926. It is set in a futuristic urban dystopia and examines a common science fiction theme of the day: the social crisis between labour and management in capitalism.
The film features special effects and set design that still impress modern audiences with their visual impact—the film contains cinematic and thematic links to German Expressionism, though the architecture as portrayed in the film appears based on contemporary Modernism and Art Deco. The latter, a brand-new style in Europe at the time, had not reached mass production yet and was considered an emblem of the bourgeois class, and similarly associated with the ruling class in the film.