sentence: Legend says the opera was based on a real-life incident that occurred in Vienna.
sentences_after: In the 19th century, the opera was considered somewhat naughty, and was rarely performed. Modern critics however realize the music is some of Mozart's finest, and the opera is now frequently performed around the world.
concept_name: legend
headings: Così fan tutte
categories: Compositions by Wolfgang Amadeus Mozart 18th century operas