Home› Librettists› Nicola Francesco Haym Librettist · Catalogued Works Nicola Francesco Haym 2 opera libretti catalogued, listed by date of premiere. Complete Catalogue of Libretti by Nicola Francesco Haym n/a Flavio by George Frideric Handel George Frideric Handel German 1724 Giulio Cesare by George Frideric Handel, 1724 George Frideric Handel German