Are "Lady Macbeth of the Mtsensk District" and "Iphigénie en Tauride" both operas?
yes
Lady Macbeth of the Mtsensk District (opera)
Lady Macbeth of the Mtsensk District (Russian: "Леди Макбет Мценского уезда" , or "Ledi Makbet Mtsenskogo uyezda") is an opera in four acts and nine scenes by Dmitri Shostakovich, his Opus 29.
 The libretto, jointly written by Alexander Preys and the composer, is based on the novel of the same name by Nikolai Leskov.
 (The opera is incorrectly named "Lady Macbeth of Mtsensk" on several commercial CD and DVD recordings.)
Iphigénie en Tauride
Iphigénie en Tauride ("Iphigenia in Tauris") is a 1779 opera by Christoph Willibald Gluck in four acts.
 It was his fifth opera for the French stage.
 The libretto was written by Nicolas-François Guillard.
Siberian Lady Macbeth
Siberian Lady Macbeth (Orig.
 Sibirska Ledi Magbet), also translated as "Fury Is a Woman", is a 1962 film directed by Andrzej Wajda, based on the novella "Lady Macbeth of the Mtsensk District" by Nikolai Leskov. Iphigénie en Tauride (Desmarets and Campra)
Iphigénie en Tauride (English: "Iphigeneia in Tauris") is an opera by the French composers Henri Desmarets and André Campra.
 It takes the form of a "tragédie en musique" in a prologue and five acts.
 The libretto is by Joseph-François Duché de Vancy with additions by Antoine Danchet.
 Desmarets had begun work on the opera around 1696 but abandoned it when he was forced to go into exile in 1699.
 Campra and his regular librettist Danchet took up the piece and wrote the prologue, most of Act Five, two arias in Act One, an aria for Acts Two and Three, and two arias for the fourth act.
 The plot is ultimately based on Euripides' tragedy "Iphigeneia in Tauris". Muddle Instead of Music
Muddle Instead of Music: On the Opera "Lady Macbeth of the Mtsensk District" (Russian: Сумбур вместо музыки – Об опере «Леди Макбет Мценского уезда») is an editorial that appeared in the Soviet newspaper "Pravda" on January 28, 1936.
 The unsigned article condemned Dmitri Shostakovich's popular opera "Lady Macbeth of the Mtsensk District" as, among other labels, "formalist,” "bourgeois", "coarse" and "vulgar."
 Immediately after publication rumors began to circulate that Stalin had written the opinion.
 While this is unlikely, it is almost certain that Stalin was aware of and agreed with the article.
 "Muddle Instead of Music" was a turning point in Shostakovich's career and factored into his public withdrawal of the Fourth Symphony some months later.
 The article has since become a well-known example of Soviet censorship of the arts. Le feste d'Apollo
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". Nicolas-François Guillard
Nicolas-François Guillard (16 January 1752 – 26 December 1814) was a French librettist.
 He was born in Chartres and died in Paris, the recipient of a government pension in recognition of his work writing librettos.
 He was also on "Comité de Lecture" of the Paris Opéra.
 One of the foremost of the French librettist of his generation, he wrote libretti for many noted composers of the day, including Salieri ("Les Horaces") and in particular Sacchini ("Oedipe à Colone", amongst many others).
 His most famous work is "Iphigénie en Tauride", his first libretto, set by Gluck after the composer had initially rejected it.
 Gluck collaborated with Guillard to heavily recast the libretto, not only to suit Gluck's artistic preferences, but also to accommodate pre-existing music that Gluck borrowed, both from himself and from other composers, when composing the opera. Lady Macbeth (film)
Lady Macbeth is a 2016 British drama film directed by William Oldroyd and written by Alice Birch, based on the novel "Lady Macbeth of the Mtsensk District" by Nikolai Leskov.
 It stars Florence Pugh, Cosmo Jarvis, Paul Hilton, Naomi Ackie and Christopher Fairbank.
 The plot follows a young woman who is stifled by her loveless marriage to a bitter man twice her age. Lady Macbeth of the Mtsensk District
Lady Macbeth of the Mtsensk District or Lady MacBeth of Mtensk may refer to: Iphigénie en Tauride (Piccinni)
Iphigénie en Tauride ("Iphigeneia in Tauris") is a tragédie lyrique in four acts by Niccolò Piccinni, which was first performed on 23 January 1781 by the Académie royale de musique (the Paris Opéra) in the second Salle du Palais-Royal.
 The opera's libretto, by Alphonse du Congé Dubreuil, is based on a play of the same name by Claude Guimond de La Touche, although the ultimate source was the tragedy "Iphigeneia in Tauris" by Euripides.