L'oca del Cairo is an opera buffa (or dramma giocoso per musica), K. 422, written by Wolfgang Amadeus Mozart in 1783. Only a fragment exists of this opera that amounts to 45 minutes. It can roughly be translated as The Goose of Cairo. We know, from a letter to his father Leopold, that he stopped writing it due to his thinking it was silly, though he managed to finish most of the first act. The libretto, by Giovanni Battista Varesco remains.
The opera follows aristocrat Don Pippo, marries a younger woman, hence banishing his wife. He has unwanted control over his daughter also, and decides he does not like her new lover Biondello. Thus, he is snuck into Pippos fortress using the mechanical goose in a Trojanesque feat of trust.
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