Alceste is the name of the so-called reform opera for Vienna that came before the one first performed in Vienna in the presence of Empress Maria Theresa.
 It is the third of Gluck's so-called reform operas for Vienna, following "Alceste" and "Orfeo ed Euridice", and the least often performed of the three. 
Orfeo ed Euridice (French version: Orphe et Eurydice ; English: "Orpheus and Eurydice") is an opera composed by Christoph Willibald Gluck based on the myth of Orpheus, set to a libretto by Ranieri de' Calzabigi. 
 The piece was first performed at the Burgtheater in Vienna on 5 October 1762 in the presence of Empress Maria Theresa. 
