Most composers couldn't fill 20 CDs with all their works; it takes that many just to house the operas of one of the most prolific composers in classical music. These late-'70s recordings (featuring the Orchestre de Chambre de Lausanne under the direction of Antal Dorati) were groundbreaking at the time and remain cherished documents of some of Haydn's lesser-known works. You'll hear Armida (featuring Jessye Norman); La Fedelta Premiata ( Fidelity Rewarded ); Orlando Paladino ( Orlando the Paladin ); La Vera Costanza ( True Constancy , also with Norman); L'Incontro Improvviso ( The Unforeseen Encounter ); L'Infedelta Delusa ( Infidelity Outwitted ); L'Insola Disabitata ( The Desert Island ), and Il Mondo Della Luna (The World on the Moon ) plus additional arias!