Question: When did the opera in which Friederike Grün played Agathe premier ? 
Sentence (from "Der Freischütz"): Der Freischütz , Op. 77, J. 277, (usually translated as "The Marksman" or "The Freeshooter") is a German opera with spoken dialogue in three acts by Carl Maria von Weber with a libretto by Friedrich Kind.
Relevant evidence: No