 The finale, named after the Dona nobis pacem from the Mass, is more episodic, with an insistent, brutal marching rhythm building to a dissonant climax, before a long, lyrical coda concludes the work.A melody resembling the robin song from "Jeanne d'Arc au Bûcher", can be heard towards the end of each movement.Honegger himself wrote an extensive commentary on the work, making explicit the music's connection with the horrors of the War, and the desire for peace.