Calto is an opera seria

Opera seria

Opera seria is an Italian musical term which refers to the noble and "serious" style of Italian opera that predominated in Europe from the 1710s to c. 1770...

in 3 acts by Francesco Bianchi. 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...

 was by Giuseppe Maria Foppa, after the 'celtic' poetry of Ossian

Ossian

Ossian is the narrator and supposed author of a cycle of poems which the Scottish poet James Macpherson claimed to have translated from ancient sources in the Scots Gaelic. He is based on Oisín, son of Finn or Fionn mac Cumhaill, anglicised to Finn McCool, a character from Irish mythology...

. The opera was first performed at the Teatro San Benedetto

Teatro San Benedetto

The Teatro San Benedetto was a theatre in Venice, particularly prominent in the operatic life of the city in the 18th and early 19th centuries. It saw the premieres of over 140 operas, including Rossini's L'italiana in Algeri, and was the theatre of choice for the presentation of opera seria until...

 in Venice

Venice

Venice is a city in northern Italy which is renowned for the beauty of its setting, its architecture and its artworks. It is the capital of the Veneto region...

 on 23 January 1788.

Calto was an innovative work with some special instrumentation. As Marita P. McClymonds explains "Bianchi uses flat keys, fluctuating modes, chromatic dissonances and an unusually wide range of wind timbres (oboe, bassoon, clarinet, horn and English horn) for maximum dramatic effect."

Roles

Role	Voice type	Premiere Cast, 23 January 1788 (Conductor:)
Duntalmo, usurper king	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...	Giuseppe Bertelli
Corimba, Duntalmo's daughter, secretly married to Calto	soprano	Maria Giacinta Galli
Sinveno	soprano castrato	Tommaso Catena
Calto, son of the rightful king killed by Duntalmo, adopted by Sinveno	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...   castrato Castrato A castrato is a man with a singing voice equivalent to that of a soprano, mezzo-soprano, or contralto voice produced either by castration of the singer before puberty or one who, because of an endocrinological condition, never reaches sexual maturity.Castration before puberty prevents a boy's...	Giovanni Rubinelli
Asteria	soprano	Maria Bellavigna
Conalbo	tenor	Antonio Mora

Synopsis

Calto claims his rightful throne from the usurper Duntalmo, but the latter is saved by Corimba, who turns out to be both Duntalmo's daughter and the mother of Calto's two children.