Goethe as Orestes and Corona Schröter as Iphigenia in the first performance of Goethe’s Iphigenia in Tauris on April 6, 1779. Painting by Georg Melchior Kraus. I suppose that these are the actual costumes they performed in.
Goethe had met Schröter in Leipzig, where she studied at Johann Adam Hiller’s school. He brought her to Weimar as a court singer, and she performed a lot on the court amateur theater as an actress as well. Unfortunately, most of her compositions and writings are lost.