Question: Are Euridice and Les pêcheurs de perlesboth operas?

Context articles: Brett Polegato
Léontine de Maësen
David Gilmour in Concert
Les pêcheurs de perles
Le feste d'Apollo
Euridice (Peri)
Jean-Vital Jammes
Orfeo ed Euridice
Messe des pêcheurs de Villerville
Au fond du temple saint

Brett Polegato (born 1968 in Niagara Falls, Ontario, Canada) is an operatic baritone.
 In 1999 he made his Lyric Opera of Chicago debut as Peter Niles in Levy's "Mourning Becomes Electra" followed by his La Scala debut in 2000 as Ned Keene in Britten's "Peter Grimes".
 He is particularly known for his interpretation of the title role in Debussy's "Pelléas et Mélisande" which he has performed with many companies including the Bavarian State Opera, Opéra National de Paris, Oper Leipzig, and Opéra National du Rhin among others.
 Other European appearances include Ubalde in Gluck's "Armide" at Opéra de Nice, the title role in Monteverdi's "Orfeo" at Opéra d'Avignon, and Frère Lèon in Messaien's "Saint François d'Assise" at Opéra National de Paris.
 He has sung numerous roles with Flanders Opera, including Guglielmo in Mozart's "Così fan tutte", Albert in Massenet's "Werther", and the Steward in Jonathan Dove's "Flight".
 In his native Canada, Polegato has sung Papageno in Mozart's "Die Zauberflöte", Figaro in Rossini's "Il barbiere di Siviglia", and Zurga in Bizet's "Les pêcheurs de perles" with Vancouver Opera.
 In the United States, he has sung with New York City Opera, Houston Grand Opera, and Michigan Opera Theatre as well as making many concert appearances and recordings with American orchestras.
 He made his Seattle Opera debut in 2005 as Henry Miles in Jake Heggie's "The End of the Affair" and returned to the company in 2007 as Orestes in Gluck's "Iphigenia in Tauris".
Léontine de Maësen (15 July 1835 – 1906) was a Belgian coloratura soprano active on the opera stages of France from 1858 to 1868.
 She is most remembered today for having created the role of Leïla in Bizet's 1863 opera, "Les pêcheurs de perles".
David Gilmour in Concert is a DVD of Pink Floyd guitarist David Gilmour's solo concert at the Royal Festival Hall, London in June 2001, as part of the Robert Wyatt-curated Meltdown festival.
 It also features additional footage recorded during three concerts at the same venue in January 2002.
 The track selection includes several Pink Floyd compositions in addition to Gilmour's solo works.
 Guest appearances are made by Floyd colleague Richard Wright, as well as Robert Wyatt and Bob Geldof.
 It includes the first ever performance of "Smile" a track which would appear almost five years later on Gilmour's third solo album - "On an Island", and Gilmour even plays a few Syd Barrett compositions.
 Also included is "Je crois entendre encore " ("I still believe I hear"), an aria from Georges Bizet's opera "Les pêcheurs de perles " ("The Pearl Fishers"), with a libretto by Eugène Cormon and Michel Carré, and sung by Gilmour in the original French.
Les pêcheurs de perles (The Pearl Fishers) is an opera in three acts by the French composer Georges Bizet, to a libretto by Eugène Cormon and Michel Carré.
 It was premiered on 30 September 1863 at the Théâtre Lyrique in Paris, and was given 18 performances in its initial run.
 Set in ancient times on the island of Ceylon (Sri Lanka), the opera tells the story of how two men's vow of eternal friendship is threatened by their love for the same woman, whose own dilemma is the conflict between secular love and her sacred oath as a priestess.
 The friendship duet "Au fond du temple saint ", generally known as "The Pearl Fishers Duet", is one of the best-known in Western opera.
Styled a "festa teatrale", "Le feste d'Apollo" consists of a prologue and three self-contained acts on the model of French "opéra-ballet" (the court of Parma was passionately interested in French culture).
 Gluck knew the Archduchess Maria Amalia well as she had sung in two of his operas, "Il Parnaso confuso" and "La corona", in Vienna.
 The composer recycled a lot of music from his earlier operas in the score of "Le feste".
 In fact, the whole of the third act, "Orfeo", is a shorter reworking of his most famous piece, "Orfeo ed Euridice" (1762).
 The overture to the prologue is taken from "Telemaco".
 Gluck later reused some of the choruses in two of the operas he wrote for Paris, "Iphigénie en Aulide" and "Iphigénie en Tauride".
Euridice (also Erudice or Eurydice) is an opera by Jacopo Peri, with additional music by Giulio Caccini.
 It is the earliest surviving opera, Peri's earlier "Dafne" being lost.
 (Caccini wrote his own "Euridice" even as he supplied music to Peri's opera, published this version before Peri's was performed, in 1600, and got it staged two years later.)
 The libretto by Ottavio Rinuccini is based on books X and XI of Ovid's "Metamorphoses"
Jean-Vital Jammes (known by the stage name Ismaël) (28 April 1825 – 13 June 1893) was a French opera singer.
 During a stage career spanning 40 years, he created many leading baritone roles, including Zurga in Bizet's "Les pêcheurs de perles" and Ourrias in Gounod's "Mireille".
 Born in Le Passage d'Agen near the town of Agen, he was largely self-taught and made his stage debut in 1841 at the age of 16.
 After singing in a several provincial theatres, he was engaged by the Théâtre Lyrique in Paris and later by the Opéra-Comique.
 Following his retirement from the stage, Ismaël lived in Marseille where he died at the age of 68.
Orfeo ed Euridice (French version: Orphée et Eurydice ; English: "Orpheus and Eurydice") is an opera composed by Christoph Willibald Gluck based on the myth of Orpheus, set to a libretto by Ranieri de' Calzabigi.
 It belongs to the genre of the "azione teatrale", meaning an opera on a mythological subject with choruses and dancing.
 The piece was first performed at the Burgtheater in Vienna on 5 October 1762 in the presence of Empress Maria Theresa.
 "Orfeo ed Euridice" is the first of Gluck's "reform" operas, in which he attempted to replace the abstruse plots and overly complex music of "opera seria" with a "noble simplicity" in both the music and the drama.
The Messe des pêcheurs de Villerville (Mass of the fishermen of Villerville) is a missa brevis written by Gabriel Fauré in collaboration with his former pupil André Messager.
 A later version, published as Messe basse contained only movements composed by Fauré.
"Au fond du temple saint " ("At the back of the holy temple") is a duet from Georges Bizet's 1863 opera "Les pêcheurs de perles".
 The libretto was written by Eugène Cormon and Michel Carré.
 Generally known as "The Pearl Fishers' Duet", it is one of the best-known numbers in Western opera.
 It is sung by Nadir (tenor) and Zurga (baritone) in act 1.