Grace Melzia Bumbry was an American opera singer, considered one of the leading mezzo-sopranos of her generation, who also ventured to soprano roles. She belonged to a pioneering generation of African-American classical singers, led by Marian Anderson. She was recognized internationally when Wieland Wagner cast her for the 1961 Bayreuth Festival as Venus in Tannhäuser, the first black singer to appear at the festival.

Wieland Wagner was a German opera director, and grandson of Richard Wagner. As co-director of the Bayreuth Festival when it re-opened after World War II, he was noted for innovative new stagings of the operas, departing from the naturalistic scenery and lighting of the originals.