Who wrote the opera first performed on 26 October 1786 at the medieval castle and subsequent palace which served as a residence for the French monarchs from Louis VII to Napoleon III?
Phèdre (opera): Phèdre ("Phaedra") is an opera by the French composer Jean-Baptiste Lemoyne, first performed at Fontainebleau on 26 October 1786. Palace of Fontainebleau:  The medieval castle and subsequent palace served as a residence for the French monarchs from Louis VII to Napoleon III.
Jean-Baptiste Lemoyne