Wilhelm Richard Wagner (1813–1883) was a German composer, conductor, and music theorist, best known for his operas and innovative concepts in musical drama. His genre primarily encompasses opera, with a distinct focus on the synthesis of music, poetry, and stagecraft, which he termed "Gesamtkunstwerk" or "total work of art." Wagner’s notable works include the epic four-opera cycle "Der Ring des Nibelungen" (The Ring of the Nibelung), comprising "Das Rheingold," "Die Walküre," "Siegfried," and "Götterdämmerung." Other significant operas include "Tristan und Isolde," "Die Meistersinger von Nürnberg," and "Parsifal." His operas are characterized by complex harmonies, intricate motifs, and a unique approach to orchestration. Wagner's impact on music is profound; he challenged traditional harmonic practices and laid the groundwork for modern music theory and composition. His ideas influenced a wide range of composers, particularly in the late 19th and early 20th centuries, and his operatic innovations paved the way for future developments in the genre. Wagner's legacy remains controversial, particularly due to his political views and the appropriation of his music by various ideologies.