György Ligeti wrote which opera, Le Grand Macabre, or Les Indes galantes?
Le Grand Macabre: Le Grand Macabre (1974–77, revised version 1996) is György Ligeti's only opera. Les Indes galantes:  Chicagou had a letter read pledging allegiance to the crown.
Le Grand Macabre (1974–77, revised version 1996) is György Ligeti's only opera.