Question: Which opera was first performed, Don Quichotte or Euridice?
Sentence (from "Orfeo ed Euridice"): "Orfeo ed Euridice" is the first of Gluck's "reform" operas, in which he attempted to replace the abstruse plots and overly complex music of "opera seria" with a "noble simplicity" in both the music and the drama.
Relevant evidence: No