The Marriage of Figaro (play)
The play formed the basis for an opera with a libretto by Lorenzo Da Ponte and music by Mozart, also called "The Marriage of Figaro" (1786). In 1799, another opera based on the same play, "La pazza giornata, ovvero Il matrimonio di Figaro", was produced in Venice with libretto by Gaetano Rossi and music by Marcos Portugal.
I due Figaro (Mercadante)
I due Figaro, o sia Il soggetto di una commedia is an opera (melodramma buffo) in two acts by Saverio Mercadante to a libretto by Felice Romani based on "Les deux Figaro" by Honoré-Antoine Richaud Martelly. The opera was composed in 1826 but its production was delayed for some years due to censors' intervention.