Are both Eine florentinische Tragödie and Alceste operas?
Alceste (Gluck) Alceste, Wq. 37 (the later French version is Wq. 44), is an opera by Christoph Willibald Gluck from 1767. The libretto (in Italian) was written by Ranieri de' Calzabigi and based on the play "Alcestis" by Euripides. The premiere took place on 26 December 1767 at the Burgtheater in Vienna.
L'ancêtre L'ancêtre' is an 1905 drame lyrique in 3 acts by Camille Saint-Saëns to a libretto by Lucien Augé de Lassus (1841-1914). The opera premiered at the Opéra de Monte-Carlo. The plot is set in Corsica, which composer and librettist visited together looking for local colour.