Wagner: Tristan und Isolde
Tristan und Isolde (Tristan and Isolde), WWV 90, is an opera in three acts by Richard Wagner to a German libretto by the composer, based largely on the 12th-century romance Tristan and Iseult by Gottfried von Strassburg. It was composed between 1857 and 1859 and premiered at the Königliches Hoftheater und Nationaltheater in Munich on 10 June 1865 with Hans von Bülow conducting. Wagner referred to the work, not as an opera, but called it "eine Handlung" (literally a drama, a plot, or an action).
Wagner's composition of Tristan und Isolde was inspired by the philosophy of Arthur Schopenhauer (particularly The World as Will and Representation), as well as by Wagner's affair with Mathilde Wesendonck. Widely acknowledged as a pinnacle of the operatic repertoire, Tristan was notable for Wagner's unprecedented use of chromaticism, tonal ambiguity, orchestral color, and harmonic suspension.