Question: What nationality/style of Opera did both Alessandro Scarlatti and Christoph Willibald Gluck compose?
Sentence (from "Armida (Salieri)"): Salieri's opera was first performed at the Vienna Burgtheater on 2 June 1771, and his composition was much influenced by the aesthetics of Christoph Willibald Gluck, who attempted to reform "opera seria" by tying the drama more closely to the music.
Relevant evidence: No