Una cosa rara

Il burbero di buon cuore (1786)Una cosa rara (1786)L'arbore di Diana (1787)
Una cosa rara, ossia Bellezza ed onestà  (A Rare Thing, or Beauty and Honesty) is an opera by the composer Vicente Martín y Soler. It takes the form of a dramma giocoso in two acts. The libretto, by Lorenzo da Ponte, is based on the play La luna de la sierra by Luis Vélez de Guevara. The opera was first performed at the Burgtheater, Vienna on 17 November 1786. It was a huge success. Mozart quotes the music to the ensemble O quanto in sì bel giubilo towards the end of Don Giovanni.