Una cosa rara, ossia Bellezza ed onestà (A Rare Thing, or Beauty and Honesty) is an opera

Opera

Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting. Opera incorporates many of the elements of spoken theatre, such as acting, scenery, and costumes and sometimes includes dance...

 by the composer Vicente Martín y Soler

Vicente Martín y Soler

Vicente Martín y Soler was a Spanish composer of opera and ballet. Although relatively obscure today, in his own day he was compared favorably with his contemporary, Wolfgang Amadeus Mozart, as a composer of opera buffa. He has been called the Valencian Mozart.He was born in Valencia and studied...

. It takes the form of a dramma giocoso

Dramma giocoso

Dramma giocoso is the name of a genre of opera common in the mid-18th century. The term is a contraction of "dramma giocoso per musica" and is essentially a description of the text rather than the opera as a whole...

 in two acts. The libretto

Libretto

A libretto is the text used in an extended musical work such as an opera, operetta, masque, oratorio, cantata, or musical. The term "libretto" is also sometimes used to refer to the text of major liturgical works, such as mass, requiem, and sacred cantata, or even the story line of a...

, by Lorenzo da Ponte

Lorenzo Da Ponte

Lorenzo Da Ponte was a Venetian opera librettist and poet. He wrote the librettos for 28 operas by 11 composers, including three of Mozart's greatest operas, Don Giovanni, The Marriage of Figaro and Così fan tutte....

, is based on the play La luna de la sierra by Luis Vélez de Guevara

Luís Vélez de Guevara

Luis Vélez de Guevara was a Spanish dramatist and novelist.Velez de Guevara was born at Écija and was of Jewish converso descent...

. The opera was first performed at the Burgtheater

Burgtheater

The Burgtheater , originally known as K.K. Theater an der Burg, then until 1918 as the K.K. Hofburgtheater, is the Austrian National Theatre in Vienna and one of the most important German language theatres in the world.The Burgtheater was created in 1741 and has become known as "die Burg" by the...

, Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 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

Don Giovanni

Don Giovanni is an opera in two acts with music by Wolfgang Amadeus Mozart and with an Italian libretto by Lorenzo Da Ponte. It was premiered by the Prague Italian opera at the Teatro di Praga on October 29, 1787...

.

Roles

Role	Voice type	Premiere Cast 17 November 1786
Queen Isabella	soprano Soprano A soprano is a voice type with a vocal range from approximately middle C to "high A" in choral music, or to "soprano C" or higher in operatic music. In four-part chorale style harmony, the soprano takes the highest part, which usually encompasses the melody...	Luisa Laschi-Mombelli
Lilla	soprano	Nancy Storace Nancy Storace Nancy Storace , , was an English operatic soprano...
Prince Don Giovanni	tenor Tenor The tenor is a type of male singing voice and is the highest male voice within the modal register. The typical tenor voice lies between C3, the C one octave below middle C, to the A above middle C in choral music, and up to high C in solo work. The low extreme for tenors is roughly B2...	Vincenzo Calvesi Vincenzo Calvesi Vincenzo Calvesi was an Italian operatic tenor and impresario. A skillful lyric tenor, he began his career performing in opera houses in Italy during the 1770s. He was active in Dresden in 1782 to 1783 and then spent most of his time performing in Vienna from 1785 to 1794...
Corrado	tenor	Michael Kelly
Ghitta	soprano	Dorotea Sardi-Bassani
Titta	bass	Francesco Benucci
Lubino	baritone Baritone Baritone is a type of male singing voice that lies between the bass and tenor voices. It is the most common male voice. Originally from the Greek , meaning deep sounding, music for this voice is typically written in the range from the second F below middle C to the F above middle C Baritone (or...	Stefano Mandini
Hoffmann	bass	Lisargo

Synopsis

The town mayor and the Spanish prince Don Giovanni try to seduce the virtuous Lilla, who is engaged to Lubino. The queen finds out and resolves the state of affairs so Lilla is able to marry her beloved.

Sources

• The Viking Opera Guide ed. Holden (Viking, 1993)
• Del Teatro (in Italian)
• Amadeus Online