Richard Wagner

Der Ring des Nibelungen consists of four operas—Das Rheingold, Die Walküre, Siegfried, and Götterdämmerung—with a total running time of approximately 15 hours, typically performed over four consecutive evenings. Wagner composed the cycle over roughly 26 years, completing it in 1874.

The Bayreuth Festival Theatre is a purpose-built opera house in Bayreuth, Germany, designed by Wagner himself specifically to stage the Ring Cycle and his other mature operas. It opened in 1876 with the first complete performance of the Ring and continues to host the annual Bayreuth Festival, dedicated exclusively to Wagner's works.

A leitmotif is a recurring musical theme associated with a specific character, object, idea, or emotion, a technique that Wagner perfected and embedded deeply into his operatic structure. These motifs evolve and transform throughout the drama to reflect psychological and narrative changes, and the approach profoundly influenced later film composers such as John Williams.

Yes, Wagner wrote virulently anti-Semitic essays, most notably 'Das Judenthum in der Musik' (Judaism in Music), first published in 1850. His anti-Semitism and the nationalist themes in his work were later exploited by Adolf Hitler and the Nazi regime, though Wagner himself died in 1883, decades before the rise of Nazism.