Ivanhoé is an 1826 pastiche opera in three acts with music by Gioachino Rossini, the  music was adapted, with the composer's permission, by the music-publisher Antonio Pacini from Rossini's operas, namely La gazza ladra, is a "melodramma" or opera semiseria in two acts by Gioachino Rossini, with a libretto by who?
La gazza ladra La gazza ladra (] , The Thieving Magpie) is a "melodramma" or opera semiseria in two acts by Gioachino Rossini, with a libretto by Giovanni Gherardini based on "La pie voleuse" by Théodore Baudouin d'Aubigny and Louis-Charles Caigniez.
Semiramide riconosciuta (Porpora) Semiramide riconosciuta ("Semiramis Recognized") is an Italian opera with serious action, or "dramma per musica", by Nicola Porpora, set to a libretto by the renowned poet Metastasio with some textual changes, possibly by Domenico Lalli. The opera was written for some of the finest contemporary singers, and includes a technically demanding series of da capo arias.