Franz Lehár
He is most famous for his operettas. The best known one is The Merry Widow (in German: Die lustige Witwe) which is probably the most popular of all operettas. He also wrote sonatas, symphonic poems, marches, and a number of waltzes, some of which come from his famous operettas. Some of the songs from his operettas have become very well-known, especially "Vilja" from The Merry Widow and "You Are My Heart's Delight" ("Dein ist mein ganzes Herz") from The Land of Smiles.