Tristan und Isolde in the context of "Hans von Bülow"

Wilhelm Richard Wagner (/ˈvɑːɡnər/ VAHG-nər; German: [ˈvɪlˌhɛlm ˈʁɪçaʁt ˈvaːɡnɐ] ; 22 May 1813 – 13 February 1883) was a German composer, theatre director, essayist, and conductor, best known for his operas—although his mature works are often referred to as music dramas. Unlike most composers, Wagner wrote both the libretti and the music for all of his stage works. He first achieved recognition with works in the Romantic tradition of Carl Maria von Weber and Giacomo Meyerbeer, but revolutionised the genre through his concept of the Gesamtkunstwerk ("total work of art"), which sought to unite poetic, musical, visual, and dramatic elements. In this approach, the drama unfolds as a continuously sung narrative, with the music evolving organically from the text rather than alternating between arias and recitatives. Wagner outlined these ideas in a series of essays published between 1849 and 1852, most fully realising them in the first half of his four-opera cycle Der Ring des Nibelungen (The Ring of the Nibelung).

Wagner's compositions, particularly in his later period, have complex textures, rich harmonies and orchestration, and elaborate leitmotifs—musical phrases associated with individual characters, places, ideas, or plot elements. His advances in musical language, such as extreme chromaticism and quickly shifting tonal centres, greatly influenced the development of classical music; his Tristan und Isolde is regarded as an important precursor to modernist music. Later in life, he softened his ideological stance against traditional operatic forms (e.g., arias, ensembles and choruses), reintroducing them into his last few stage works, including Die Meistersinger von Nürnberg (The Mastersingers of Nuremberg) and Parsifal.

Tristan and Iseult, also known as Tristan and Isolde and other names, is a medieval chivalric romance told in numerous variations since the 12th century. Of disputed source, usually assumed to be primarily Celtic, the tale is a tragedy about the illicit love between the Cornish knight Tristan and the Irish princess Iseult in the days of King Arthur. During Tristan's mission to escort Iseult from Ireland to marry his uncle, King Mark of Cornwall, Tristan and Iseult ingest a love potion, instigating a forbidden love affair between them.

The legend has had a lasting impact on Western culture. Its different versions exist in many European texts in various languages from the Middle Ages. The earliest instances take two primary forms: the so-called courtly and common branches, respectively associated with the 12th-century poems of Thomas of Britain and Béroul, the latter believed to reflect a now-lost original tale. A subsequent version emerged in the 13th century in the wake of the greatly expanded Prose Tristan, merging Tristan's romance more thoroughly with the Arthurian legend. Finally, after the revived interest in the medieval era in the 19th century under the influence of Romantic nationalism, the story has continued to be popular in the modern era, notably Wagner's operatic adaptation.

Gottfried von Strassburg (died c. 1210) is the author of the Middle High German courtly romance Tristan, an adaptation of the 12th-century Tristan and Iseult legend. Gottfried's work is regarded, alongside the Nibelungenlied and Wolfram von Eschenbach's Parzival, as one of the great narrative masterpieces of the German Middle Ages. He is probably also the composer of a small number of surviving lyrics. His work became a source of inspiration for Richard Wagner's opera Tristan und Isolde (1865).