Das geheime Königreich

Das geheime Königreich (The Secret Kingdom) is an opera in one act with words and music by Ernst Krenek, his Op. 50 and the second of three one-acters (with Der Diktator and Schwergewicht, oder Die Ehre der Nation) which premiered on 6 May 1928 at the Hessisches Staatstheater Wiesbaden as part of the Mai-Festwoche Wiesbaden. It is subtitled Märchenoper in 1 Akt (fairy-tale opera in one act) and has been called a satirical fairy-tale opera.