 A late example of a genuine "comédie-ballet" is "La princesse de Navarre" by Voltaire, which was performed at Versailles on 23 February 1745.It consisted of a prologue and three acts, with the addition of an overture and three musical divertissements, one per act, composed by Jean-Philippe Rameau.The vocal music is particularly difficult to sing and includes a virtuoso duet for hautes-contre.