L'Aiglon is an opera (drame musical) in five acts composed by Arthur Honegger and Jacques Ibert.

A 2016 reviewer described it as "a singular piece of work" with its "blend of operetta, divertissement, conversation piece, historical pageant and, in the disturbingly powerful fourth act set on the Napoleonic battlefield at Wagram, phantasmagoria peopled with living figures onstage and dead voices off".

[2] At the Paris Opera that August, Heldy repeated her performance alongside Vanni-Marcoux under François Ruhlmann.

[2] The work was revived in February 2016 at the Opéra de Marseille with Stéphanie d'Oustrac in the title role and conducted by Jean-Yves Ossonce.

The Duke of Reichstadt (Napoleon II), with his faithful footman Séraphin Flambeau, escapes from Austrian imprisonment and visits the old site of the Battle of Wagram, before eventually dying of tuberculosis.