"Citizen Kane" is a 1941 American mystery drama film by Orson Welles, its producer, co-screenwriter, director and star. The picture was Welles's first feature film. Nominated for Academy Awards in nine categories, it won an Academy Award for Best Writing (Original Screenplay) by Herman J. Mankiewicz and Welles. Considered by many critics, filmmakers, and fans to be the greatest film of all time, Citizen Kane was voted as such in five consecutive British Film Institute Sight & Sound polls of critics, and it topped the American Film Institute's 100 Years ... 100 Movies list in 1998, as well as its 2007 update. Citizen Kane is particularly praised for its cinematography, music, editing and narrative structure, which have been considered innovative and precedent-setting.

The film examines the life and legacy of Charles Foster Kane, played by Welles, a character based in part upon the American newspaper magnate William Randolph Hearst, Chicago tycoons Samuel Insull and Harold McCormick, and aspects of Welles's own life. Upon its release, Hearst prohibited mention of the film in any of his newspapers. Kane's career in the publishing world is born of idealistic social service, but gradually evolves into a ruthless pursuit of power. Narrated principally through flashbacks, the story is told through the research of a newsreel reporter seeking to solve the mystery of the newspaper magnate's dying word: "Rosebud".

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