January 21, 1848: Marie Eugène Henri Duparc is born in Paris, Kingdom of France, the son of Louis-Charles Duparc, director of the Western Railway, and Frédérique Amélie de Gaité, daughter of a noble family from Lorraine.
June 26, 1870: Die Walküre, a music-drama by Richard Wagner (57) to his own words, is performed for the first time, against the composer’s wishes, in the Königliches Hof-und Nationaltheater, Munich. Among the audience are Johannes Brahms (37), Camille Saint-Saëns (34), and Henri Duparc (22). See 14 August 1876.
July 19, 1870: Visitors from France, including Camille Saint-Saëns (34) and Henri Duparc (22), arrive to visit ardent Germanophile Richard Wagner (57) and Cosima von Bülow at Tribschen, near Lucerne, Switzerland. The visit is somewhat awkward, but Wagner manages to keep his conversation on music. Cosima, however, can't help herself. They will stay until 30 July, during which time Wagner’s anti-French rhetoric becomes more strident.
February 25, 1871: The Société National de Musique is founded in the Paris home of Henri Duparc by César Franck (48), Camille Saint-Saëns (35), Georges Bizet (32), Jules Massenet (28), Gabriel Fauré (25), Henri Duparc (23), Vincent d’Indy (19), and others. The concerts of the Society are to be limited to living French composers.
November 9, 1871: Henri Duparc (23) marries Ellie MacSwiney at Eglise de missions étrangères, rue de Bac in Paris.
January 24, 1874: Suite de valses for orchestra by Henri Duparc (26) is performed for the first time, by the Société National de Musique, Paris.
April 11, 1874: Poème nocturne for orchestra by Henri Duparc (26) is performed for the first time, by the Société National de Musique, Paris.
May 15, 1875: Lénore, a symphonic poem by Henri Duparc (27), is performed for the first time, by the Société National de Musique, Paris.
June 15, 1899: A funeral service in memory of Ernest Chausson held in St. François-de-Sales, Paris is attended by hundreds of artists, among them Gabriel Fauré (54), Henri Duparc (51), Isaac Albéniz (39), Claude Debussy (36), Paul Dukas (33), Charles Koechlin (31), Edgar Degas, and Auguste Rodin. His mortal remains are laid to rest in Père Lachaise Cemetery, Paris.
February 26, 1911: Aux étoiles for orchestra by Henri Duparc (63) is performed for the first time, in Paris.
February 12, 1933: Marie Eugène Henri Duparc dies at Mont-de-Marsan, Landes, Republic of France, aged 85 years and 22 days. His earthly remains will be laid to rest in the Cemetery of Père Lachaise, Paris.