Based on the legend of Orpheus, Christoph Willibald Gluck’s Orpheus and Eurydice, which tells of the former’s attempt to rescue the latter from the Underworld after she dies, is a seminal work in the evolution of opera. With its focus on an underground rescue mission in which the hero must conceal his true feelings, it was to be a major influence on German opera and specifically the plots of Mozart’s Die Zauberflöte, Beethoven’s Fidelio and Wagner’s Das...