Home› Librettists› F. Zell and Richard Genée Librettist · Catalogued Works F. Zell and Richard Genée 3 opera libretti catalogued, listed by date of premiere. Complete Catalogue of Libretti by F. Zell and Richard Genée n/a Gräfin Dubarry by Carl Millöcker Carl Millöcker German 1875 Cagliostro in Wien by Johann Strauss II, 1875 Johann Strauss II German 1883 Eine Nacht in Venedig by Johann Strauss II, 1883 Johann Strauss II German