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.
Robert de Flers
In 1901 de Flers married Geneviève Sardou, the daughter of Victorien Sardou. He continued to be active writing librettos. His third opera libretto, "Les travaux d'Hercule" (1901), marked his first collaboration with fellow playwright Gaston Arman de Caillavet and composer Claude Terrasse. Most of his remaining librettos were written with Caillavet, often for Terrasse who was their most frequent musical collaborator. Other composers for which the two men wrote librettos include André Messager, and Gabriel Pierné. The two men also wrote a French translation of Franz Lehár's "The Merry Widow" in 1905 which was used throughout France during the first half of the 20th century. Their last opera collaboration was for Alfred Bruneau's 1923 opera "Le jardin du paradis". De Flers also wrote the librettos for Reynaldo Hahn's "Ciboulette" (1923) with playwright Francis de Croisset, and Joseph Szulc's "Le petit choc" (1923).