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Kurt Weill was a leading composer for the stage, writing operas, operettas, and musical plays with lyricists such as Bertolt Brecht and Ira Gershwin. He is best known for his collaboration with Brecht on The Threepenny Opera and The Rise and Fall of the City of Mahagonny. Weill's music was innovative and experimental, combining elements of jazz, blues, and folk music with classical forms.