La cifra is an opera by Antonio Salieri in two acts, set to an Italian libretto by Lorenzo Da Ponte.

The work, a dramma giocoso, is set in Scotland, and was written for Adriana Ferrarese del Bene, the first Fiordiligi in Mozart's Così fan tutte.

[2] La cifra received a recent performance in Cologne in June 2006, in a production conducted by Martin Haselböck and directed by Christian Stückl.

It was the opera's North American premiere, conducted by Catherine O'Shaughnessy and directed by Bea Goodwin Fideling, a Scottish lord, is seeking a lost noblewoman with whom he had fallen in love.

[4] There is no known studio recording of the complete opera, However, The Salieri Album, (Cecilia Bartoli with the Orchestra of the Age of Enlightenment, conducted by Ádám Fischer, Decca 475 100–2) has two excerpts: