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.
The Marriage of Figaro
The opera was produced in Prague starting in December 1786 by the Pasquale Bondini company. This production was a tremendous success; the newspaper "Prager Oberpostamtszeitung" called the work "a masterpiece", and said "no piece (for everyone here asserts) has ever caused such a sensation." Local music lovers paid for Mozart to visit Prague and hear the production; he listened on 17 January 1787, and conducted it himself on the 22nd. The success of the Prague production led to the commissioning of the next Mozart/Da Ponte opera, "Don Giovanni", premiered in Prague in 1787; see Mozart and Prague.