Title: Yvonne, Prinzessin von Burgund
Content:  Yvonne, Prinzessin von Burgund (Yvonne, Princess of Burgundy) is an opera in four acts composed by Boris Blacher to a German-language libretto by the composer based on Witold Gombrowicz's 1935 Polish play Iwona, księżniczka Burgunda (Yvonne, Burgundy Princess). Composed in 1972, it was Blacher's last opera. It premiered on 15 September 1973 at the Opernhaus Wuppertal, directed by Kurt Horres. The story is set in the royal court of an imaginary country and combines elements of tragic farce, fantasy, and moral criticism. The title role is portrayed by a mute dancer. Pina Bausch danced the title role at the Wuppertal premiere, one of her 
Title: Yvonne, princesse de Bourgogne
Content:  Yvonne, princesse de Bourgogne is a 2009 opera by Philippe Boesmans to a libretto by Swiss dramatist and director Luc Bondy based on the anti-conformist play Iwona, księżniczka Burgunda by Witold Gombrowicz. Yvonne is the fourth in a series of operas with librettos by Luc Bondy, and the first of the four to be written in French not German. The libretto for Boesmans' subsequent French opera, Au monde (2014), was provided by Joël Pommerat.
Title: Yvonne, Prinzessin von Burgund
Content:  performances before establishing her dance company Tanztheater Wuppertal. Gombrowicz's Iwona, księżniczka Burgunda was published in 1935 but did not receive its first performance until 1957 when it premiered in Warsaw. It has since served as the basis for four operas, of which Blacher's was the first. The others are the chamber opera Yvonne by Ulrich Wagner (b. 1967) with a German libretto, first performed in Krefeld in 1998; Iwona, księżniczka Burgunda by Zygmunt Krauze with a Polish libretto, first performed in Paris in 2004; and Yvonne, Princesse de Bourgogne by Philippe Boesmans with a French libretto, first performed at the Paris Opera in 2009.
Title: Yvonne (musical)
Content:  Yvonne is a musical comedy with a book and lyrics by Percy Greenbank and music by Jean Gilbert and Vernon Duke (at that time still using his birth name of Dukelsky). It was adapted by Greenbank from an Austrian musical of the same name. Some additional songs were written by the show's conductor, Arthur Wood. The story concerns an engaged young lady, Yvonne Savigny, the daughter of old professor who loves riotous gaiety. To avoid trouble, she impersonates an absent music hall star at the Scala Music Hall. A young man has fallen in love with Yvonne and disguises himself as a servant in her father's house. After various complications, Yvonne leaves her silly fiancé for the amorous suitor and all ends happily. Yvonne was first played in 
Title: Witold Gombrowicz
Content: Yvonne, Prinzessin von Burgund (1973), composed by Boris Blacher, in four acts, premiered in Wuppertal ; Die Trauung (The Marriage) by Volker David Kirchner, premiered on 27 April 1975 at the Hessisches Staatstheater Wiesbaden, conducted by Siegfried Köhler ; Opérette (2002), composed by Oscar Strasnoy, premiered in 2003 at Grand Théâtre de Reims, France ; Geschichte/History (2003), a cappella opera composed by Oscar Strasnoy, premiered in 2004 at Theaterhaus de Stuttgart ; Die Besessenen (The Possessed) (2008–2009), composed by Johannes Kalitzke, premiered in 2010 at the Theater an der Wien, Vienna, Austria, on 19 February ; Yvonne, princesse de Bourgogne (2009), composed by Philippe Boesmans, premiered at the Paris Opera 
Title: Yvonne Desportes
Content:  Yvonne Desportes (18 July 1907 – 19 July 1993) was a French composer, author, and music educator. She was born in Coburg, Germany, to Émile Desportes, a composer, and Bertha Troriep, a painter. She was a student of Paul Dukas and won the Premier Grand Prix de Rome in 1932. She taught at the Paris Conservatoire and wrote many music textbooks. She composed over 500 works.
Title: Yvonne Gouverné
Content:  Yvonne Gouverné, née Yvonne Marcelle Gouverné, (6 February 1890 – 26 October 1982) was a 20th-century French pianist by training, who went on to become an accompanist and choir conductor.
Title: Yvonne Loriod
Content:  Yvonne Louise-Georgette Loriod-Messiaen (20 January 1924 – 17 May 2010) was a French pianist, teacher, and composer, and the second wife of composer Olivier Messiaen. Her sister was the Ondes Martenot player Jeanne Loriod.
Title: Yvonne Brothier
Content:   Yvonne Brothier (born 6 June 1889 in Saint-Julien-l'Ars, Vienne, died in Paris, 22 January 1967) was a soprano operatic singer who worked principally at the Opéra-Comique, Paris. After singing in Brussels in 1914, she made her début at the Opéra-comique on 13 February 1916 in Lakmé by Delibes. She went on to create roles in Louis Aubert's La forêt bleue (Red Riding Hood) (French premiere), Graziella (title role), Marcel Samuel-Rousseau's Le Hulla (Dilara), Raoul Laparra's Le joueur de viole (the young girl), Fauré's Masques et Bergamasques, Charles-Henri Maréchal's Ping-Sin (title role) and Sylvio Lazzari's Le sauteriot (Orti). Her repertoire at the Opéra-Comique also included Rosina (The Barber of Seville), Micaëla (Carmen), Olympia (Les contes d'Hoffmann), Melisande (Pelléas 
Title: Yvonne Borree
Content: Dvorak Bagatelles ; Badchonim, or Merry-Makers 

Question: Who was the composer of Yvonne, Prinzessin von Burgund?
Answer: Boris Blacher.