Near the end of Act One, Marie (soprano Veronique Gens) is alone, considering her love for Cinq-Mars and hoping they can have a peaceful life together. She sings of the "resplendent night," to the opera's most famous melody.
THE B SIDE: "O chére et vivante image"
Alone and imprisoned, in Act Four, Cinq-Mars (tenor Mathias Vidal), has been sentenced to death. He comforts himself with clear and cherished recollections of his time with Marie.