Which was performed first in history, Palestrina or Il matrimonio segreto?
Palestrina (opera): Palestrina is an opera by the German composer Hans Pfitzner, first performed in 1917. Il matrimonio segreto: Il matrimonio segreto ("The Secret Marriage") is an opera in two acts, music by Domenico Cimarosa, on a libretto by Giovanni Bertati, based on the play "The Clandestine Marriage" by George Colman the Elder and David Garrick. Il matrimonio segreto:  It was first performed on 7 February 1792 at the Imperial Hofburg Theatre in Vienna in the presence of Emperor Leopold II.
Il matrimonio segreto