Richard Wagner (1813–1883) was a German composer, conductor, and theatre director, primarily known for his contributions to the genre of opera. His works are characterized by their innovative use of harmony, orchestration, and dramatic structure, which laid the groundwork for modern music. Wagner's notable works include the four-opera cycle "Der Ring des Nibelungen" (The Ring of the Nibelung), "Tristan und Isolde," "The Flying Dutchman," and "Parsifal." His concept of the Gesamtkunstwerk, or "total work of art," sought to synthesize music, poetry, and visual arts into a cohesive whole, influencing not only opera but also later forms of musical theatre. Wagner's impact on music extends beyond his compositions; he revolutionized the role of the orchestra and introduced complex themes of mythology and philosophy into his narratives. His ideas on music and drama inspired later composers, including Gustav Mahler and Richard Strauss, and his techniques influenced various genres, from film scores to contemporary classical music. However, his legacy is complex, as his anti-Semitic views and political beliefs have sparked significant controversy and debate.