The Threepenny Opera (German: Die Dreigroschenoper) is a musical by German dramatist Bertolt Brecht and composer Kurt Weill, in collaboration with translator Elisabeth Hauptmann and set designer Caspar Neher. It was adapted from an 18th-century English ballad opera, John Gay's The Beggar's Opera, and offers a Marxist critique of the capitalist world. It opened on 31 August 1928 at Berlin's Theater am Schiffbauerdamm.