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'ambassadrice L'ambassadrice is an opera or opéra comique in 3 acts by composer Daniel Auber. The work's French language libretto was written by Eugène Scribe and Jules-Henri Vernoy de Saint-Georges. The opera's world premiere was staged by the Opéra-Comique at the Théâtre des Nouveautés in Paris on 21 December 1836. It was revived in Paris on 4 January 2013 by the opera company Les Frivolités Parisiennes at the initiative of two research fellows who specialized in nineteenth-century historically informed performance, Pierre Girod (vocal coach) and Charlotte Loriot (stage director).