Labor on the Douro River

"Douro, Faina Fluvial" is a 1931 Portuguese documentary short film directed by Manoel de Oliveira, which portrays life and labor along the Douro River in Porto. The film serves as a portrait of Oliveira's hometown and showcases the industry that takes place along the city's main river. This silent documentary falls within the genre of city symphony films, similar to German filmmaker Walther Ruttmann's "Berlin: Symphony of a City".