Are I Lombardi alla prima crociata and Giasone both operas?
Giasone Giasone ("Jason") is an opera in three acts and a prologue with music by Francesco Cavalli and a libretto by Giacinto Andrea Cicognini. It was premiered at the Teatro San Cassiano, Venice on 5 January 1649, during carnival. "Giasone" was "the single most popular opera of the 17th century". The plot is loosely based on the story of Jason and the golden fleece, but the opera contains many comic elements too.
Messa di Gloria (Rossini) Messa di Gloria is a nine movement mass, composed by Gioacchino Rossini for the Arciconfraternita di San Luigi. First performed on 24 March 1820 in the Chiesa di San Ferdinando in Naples, it is in the traditional form of a "Gloria" mass, that is a setting of the first two prayers of the Catholic mass, the Kyrie and Gloria. (A "Gloria" mass omits the Credo, Sanctus, and Agnus Dei.) The "Messa di Gloria" was the only major piece of sacred music written while Rossini was still an active opera composer.