Question: Demofoonte was an opera by the composer who was part of what period?
Sentence (from "Christoph Willibald Gluck"): With a series of radical new works in the 1760s, among them "Orfeo ed Euridice" and "Alceste", he broke the stranglehold that Metastasian "opera seria" had enjoyed for much of the century.
Relevant evidence: No