Luther in Worms is an 1876 German-language oratorio by Ludwig Meinardus to a libretto by Wilhelm Rossmann. The work received several performances around the time of the Martin Luther anniversary year 1883. The historical opposition of Karl V to the Reformation is mitigated by the invention of a villain, Glapio, to oppose Luther.
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Luther in Worms (Meinardus) Wikipedia(Text) CC BY-SA