premiere of the opera orpheus and eurydice at the angers nantes opera on october 10 premiere of the opera orpheus and eurydice at the angers nantes opera on october 10 premiere of the opera orpheus and eurydice at the angers nantes opera on october 10 premiere of the opera orpheus and eurydice at the angers nantes opera on october 10 premiere of the opera orpheus and eurydice at the angers nantes opera on october 10