Droit du seigneur
In Mozart's "The Marriage of Figaro", which premiered in 1786 with a libretto by Lorenzo Da Ponte, the comic plot revolves around the successful efforts of the young bride and groom, Figaro and Susanna, to block the efforts of the unfaithful Count Almaviva to seduce Susanna. To achieve his aim, the frustrated Count threatens to reinstitute "droit du seigneur". It was based on a play by Pierre Beaumarchais.
Writer
Libretti (the plural of libretto) are the texts for musical works such as operas. The Venetian poet and librettist Lorenzo Da Ponte, for example, wrote the libretto for some of Mozart's greatest operas. Luigi Illica and Giuseppe Giacosa were Italian librettists who wrote for Giacomo Puccini. Most opera composers collaborate with a librettist but unusually, Richard Wagner wrote both the music and the libretti for his works himself.