Cosi Fan Tutte
Così fan tutte, ossia La scuola degli amanti (Thus Do They All, or The School For Lovers) K. 588, is an opera buffa by Wolfgang Amadeus Mozart. The libretto was written by Lorenzo Da Ponte.

Così fan tutte is one of the three Mozart operas for which Da Ponte wrote the libretto. The other two Da Ponte-Mozart collaborations were Le nozze di Figaro and Don Giovanni.

Although it is commonly held that Così fan tutte was written and composed at the suggestion of the Emperor Joseph II, recent research does not support this idea. There is evidence that Mozart's contemporary Antonio Salieri tried to set the libretto but left it unfinished. In 1994, John Rice uncovered two terzetti by Salieri in the Austrian National Library.

The title, Così fan tutte, literally means "Thus do all [women]" but it is often translated as "Women are like that". The words are sung by the three men in Act II, Scene xiii, just before the finale. Da Ponte had used the line "Così fan tutte le belle" earlier in Le nozze di Figaro (in Act I, Scene vii).

Mozart and Da Ponte took as a theme "fiancée swapping" which dates back to the 13th century, with notable earlier versions being those of Boccaccio's Decameron and Shakespeare's play Cymbeline. Elements from Shakespeare's The Taming of the Shrew are also present. Furthermore, it incorporates elements of the myth of Procris as found in Ovid's Metamorphoses, vii