Plot
Cosi -Aria Database
Beethoven thought the libretto immoral, Wagner hated the music. Cos� fan tutte is the name of one of Mozart's last operas, the phrase which - once all you male readers learn the meaning of - will become the most irresistible Italian phrase you'd use in front of your female friends (just to get them to give you a dirty look and hit you).

And that's part of the "problem". Written in 1790, one year before his death, Mozart's Cos� fan tutte sets a libretto by Lorenzo da Ponte. The full name of the work is Cos� fan tutte, ossia La scuola degli amanti - "Women are all alike, or The School for Lovers". Contrary to popular belief, it is not exactly a comic opera, but is classified as a dramma giocoso ("jocular drama"), which has a tendency to mix characteristics of opera seria (serious opera) and opera buffa (comic opera). Die Zauberfl�te, Don Giovanni and Cos� fan tutte are supreme examples of dramma giocoso.
Source
see also NPR World of Opera
Ology
Cos� fan tutte
Wolfgang Amadeus Mozart
Discovering Cos� fan tutte
An Interactive Journey into the World of Mozart's Opera
NPR at the Opera
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Roles

Fiordiligi, Lady from Ferrara and sister to Dorabella, living in Naples dramatic coloratura soprano
Dorabella, Lady from Ferrara and sister to Fiordiligi, living in Naples lyric mezzo-soprano
Guglielmo, Lover of Fiordiligi lyric baritone
Ferrando, Lover of Dorabella tenore
Despina, a maid soubrette
Don Alfonso, an old philosopher basso buffo
Chorus: soldiers, servants, sailors
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