For 10 points, name this country known for its Paris Conservatory.
In the prologue of an early opera from this country, Cadmus and Hermione, the then-ruler of this country is depicted as Apollo slaying the Python. A composer from this country wrote Cold Pieces with instructions to the musician such as "be visible for a moment" and "don't eat too much." Another composer from this country wrote a piano suite that dedicated each movement to a friend who had died fighting in World War I, and titled it for another composer from this country, (*) Couperin ["coo-pair-AHN"]. The composer of the Quartet for the End of Time, Olivier Messiaen ["oh-liv-ee-YAY mess-ay-AHN"], was from this country; he taught a serialist composer and conductor from this country, Pierre Boulez ["boo-LEZ"]. For 10 points, name this country known for its Paris Conservatory.
In the prologue of an early opera from this country, Cadmus and Hermione, the then-ruler of this country is depicted as Apollo slaying the Python.
France