L'île de Merlin, ou Le monde renversé (Merlin's Island, or the World Upended) is an opéra comique in one act composed by Christoph Willibald Gluck to a 1753 French libretto by Louis Anseaume based on Alain René Lesage and D'Orneval's 1718 vaudeville comedy Le monde renversé.
Gluck's version was first performed on 3 October 1758 at the Schönbrunn Palace in Vienna.
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