Vincent d'Indy (French: [vɛ̃sɑ̃ dɛ̃di]; 27 March 1851 – 2 December 1931) was a French composer and teacher.
Paul Marie Théodore Vincent d'Indy was born in Paris into an aristocratic family of royalist and Catholic persuasion. He had piano lessons from an early age from his paternal grandmother, who passed him on to Antoine François Marmontel and Louis Diémer. From the age of 14 he studied harmony with Albert Lavignac. At age 19, during the Franco-Prussian War, he enlisted in the National Guard, but returned to musical life as soon as the hostilities were over. The first of his works he heard performed was a Symphonie italienne, at an orchestral rehearsal under Jules Pasdeloup; the work was admired by Georges Bizet and Jules Massenet, with whom he had already become acquainted. On the advice of Henri Duparc, he became a devoted student of César Franck at the Conservatoire de Paris. As a follower of Franck, d'Indy came to admire what he considered the standards of German symphonism.
In the summer of 1873 he visited Germany, where he met Franz Liszt and Johannes Brahms. On 25 January 1874 his overture Les Piccolomini was performed at a Pasdeloup concert, sandwiched between works by Bach and Beethoven. Around this time he married Isabelle de Pampelonne, one of his cousins. In 1875 his symphony dedicated to János Hunyadi was performed. That same year he played a minor role – the prompter – at the premiere of Bizet's opera Carmen. In 1876 he was present at the first production of Richard Wagner's Ring Cycle at Bayreuth. This made a great impression on him and he became a fervent Wagnerite. In 1878 d'Indy's symphonic ballad La Forêt enchantée was performed. In 1882 he heard Wagner's Parsifal. In 1883 his choral work Le Chant de la cloche appeared. In 1884 his symphonic poem Saugefleurie was premiered. His piano suite ("symphonic poem for piano") called Poème des montagnes came from around this time. In 1887 appeared his Suite in D for trumpet, 2 flutes and string quartet. That same year he was involved in Lamoureux's production of Wagner's Lohengrin as choirmaster. His music drama Fervaal occupied him between 1889 and 1895.