Tancredi is a "melodramma eroico" (opera seria or 'heroic' opera) in two acts by composer Gioachino Rossini and librettist Gaetano Rossi (who was also to write "Semiramide" ten years later), based on Voltaire's play "Tancrède" (1760).
 The opera made its first appearance at the Teatro La Fenice in Venice on 6 February 1813, and because "Il signor Bruschino" premiered in late January, the composer must have completed "Tancredi" in less than a month.
 The overture, borrowed from "La pietra del paragone", is a popular example of Rossini's characteristic style and is regularly performed in concert and recorded.
Domenico Trimarchi is an Italian bass-baritone opera singer.
 He was born in Naples, where he studied singing at the Conservatory.
 In 1970 he made his debut at La Fenice, Venice as Belcore in "L'elisir d'amore".
 He made his British debut at the Edinburgh Festival in 1972 and first appeared at Covent Garden in 1975 playing Bartolo in "The Barber of Seville".
 In "The Times" William Mann praised him as "ripe, rubber-faced and a virtuoso patter singer."
 Trimarchi reprised the role there between 1978 and 1987.
 He has appeared at all the major opera-houses of the world, including La Scala, Milan, the Vienna State Opera and the Metropolitan Opera in New York.
L'elisir d'amore (The Elixir of Love, ] ) is a comic opera ("melodramma giocoso ") in two acts by the Italian composer Gaetano Donizetti.
 Felice Romani wrote the Italian libretto, after Eugène Scribe's libretto for Daniel Auber's "Le philtre" (1831).
 The opera premiered on 12 May 1832 at the Teatro della Canobbiana in Milan.
Maria de Rudenz is a "dramma tragico", or tragic opera, in three acts by Gaetano Donizetti.
 The Italian libretto was written by Salvadore Cammarano, based on the 5-act French Gothic melodrama "La Nonne Sanglante" (Paris, 1835), by Auguste Anicet-Bourgeois and Julien de Mallian, and elements from "The Monk" by Matthew Gregory Lewis.
 It premiered at the Teatro La Fenice in Venice, on 30 January 1838 with Caroline Ungher as Maria, Giorgio Ronconi as Corrado di Waldorf, and Napoleone Moriani as Enrico.
Una follia is an opera in one act by composer Gaetano Donizetti.
 The work premiered on 15 December 1818 at the Teatro San Luca in Venice.
 The opera uses the same Italian-language libretto by Bartolomeo Merelli after August von Kotzebue's "Der Graf von Burgund" that Donizetti used for his "Enrico di Borgogna" a month earlier, but with different music.
 It was given one performance and "never performed again, and its score has never been found."
9912 Donizetti, provisional designation 2078 T-3, is a stony Rafita asteroid from the central regions of the asteroid belt, approximately 7 kilometers in diameter.
 It was discovered during the third Palomar–Leiden Trojan survey in 1977, and named after Italian composer Gaetano Donizetti.
Il furioso all'isola di San Domingo "(The Madman on the Island of San Domingo)" is a "romantic melodramma" in two acts by the composer Gaetano Donizetti.
 Jacopo Ferretti, who since 1821 had written five libretti for Donizetti and two for Rossini (including "La cenerentola"), had proposed the unusual subject and he was contracted to write the Italian libretto based on a five-act play of the same title by an unknown author in 1820, which "had been given in the same theatre [...] and which Donizetti had immediately loved".
 However, as has been noted by Charles Osborne, the "ultimate derivation of both play and libretto is an episode in part 1 of "Don Quixote" by Miguel de Cervantes's published in 1605" which is the story of Cardenio and Lucinda.
L'ange de Nisida ("The Angel of Nisida") is an "opera semiseria" in four acts by Italian composer Gaetano Donizetti, from a libretto by Alphonse Royer and Gustave Vaëz.
Teatro La Fenice (] , "The Phoenix") is an opera house in Venice, Italy.
 It is one of "the most famous and renowned landmarks in the history of Italian theatre", and in the history of opera as a whole.
 Especially in the 19th century, La Fenice became the site of many famous operatic premieres at which the works of several of the four major "bel canto" era composers—Rossini, Bellini, Donizetti, and Verdi were performed.
Vincenzo Negrini (born Vincenzo Bartolomeo Trentanove) (24 August 1804 – 16 August 1840) was an Italian bass-baritone opera singer.
 Born in Cesena, he sang leading bass and baritone roles in Italy's major opera houses and created several roles in early 19th-century operas, most notably Oroveso in Bellini's "Norma" and Folco in Donizetti's "Ugo, conte di Parigi".
 Severe heart disease caused him to retire from the stage in June 1840.
 He died in Milan two months later at the age of 35.

Question: Domenico Trimarchi is an Italian bass-baritone opera singer, in 1970 he made his debut at La Fenice, Venice as Belcore in which comic opera, in two acts by the Italian composer Gaetano Donizetti?
Answer: L'elisir d'amore