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.
Ferdinand Lemaire
Ferdinand Lemaire (1832–1879) was a French librettist and poet, best known for writing the libretto of Camille Saint-Saëns's opera "Samson et Dalila".