Das Rheingold, performed here in English as The Rhinegold, is the first opera in Richard Wagner’s tetralogy Der Ring des Nibelungen or Ring Cycle. It sets in motion the story that plays out across the four operas, and establishes the central theme of power versus love. It sees the dwarf, or Nibelung, Alberich steal the gold that is guarded by the Rhinemaidens and forge it into a ring that makes the bearer all powerful. He is only able to do so, however, by renouncing love, which in...