Orlando paladino, Hob. 28/11, is an opera in three acts by Joseph Haydn which was first performed at Eszterháza on 6 December 1782. The libretto by Nunziato Porta is based on another libretto, Le pazz
Portrait of Haydn by Thomas Hardy, 1791
First page of the insertion duet, "Quel cor umano e tenero", composed by Joseph Haydn, words by Lorenzo Da Ponte. The caption indicates it was performed in Vicente Martín y Soler's opera Il burbero di buon cuore as sung by Anna Morichelli and Giovanni Morelli (in performances beginning 17 May 1794 at King's Theatre, London). This duet is actually an adaptation of Haydn's duet "Quel tuo visetto amabile" from this opera Orlando paladino