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.
Der Graf von Luxemburg
Like "The Merry Widow", "Der Graf von Luxemburg " deals with the themes of how the promise of wealth affects love and marriage, and the contrast between the gaiety of Parisian society and Slavic seriousness. The libretto was written by Alfred Maria Willner, Robert Bodanzky and Leo Stein. Stein had previously worked with Lehár on his 1904 "Der Göttergatte", and Bodanzky had co-authored the librettos for both "Peter und Paul reisen ins Schlaraffenland" and "Mitislaw der Moderne". The libretto for "Der Graf von Luxemburg" was not completely new. It was a re-working of the one written by Alfred Willner and Bernhard Buchbinder twelve years earlier for Johann Strauss' unsuccessful operetta "Die Göttin der Vernunft" ("The Goddess of Reason").