L'Aiglon is a play in six acts by Edmond Rostand based on the life of Napoleon II, who was the son of Emperor Napoleon I and his second wife, Empress Marie Louise. The title of the play comes from a nickname for Napoleon II, the French word for "eaglet" (a young eagle). The title role was created by Sarah Bernhardt in the play's premiere on 15 March 1900 at the Th tre Sarah Bernhardt. In October of the same year, the play (in an English translation by Louis N. Parker) premiered at New York's Knickerbocker Theatre, with Maude Adams in the title role. Its first performance in London was at Her Majesty's Theatre in 1901, with Bernhardt again playing the leading role. Rostand had written L'Aiglon specifically for Bernhardt, and it became one of her signature roles. Arthur Honegger and Jacques Ibert composed an opera in five acts, also with the title L'Aiglon, to a libretto by Henri Cain, based on Rostand's play. It was first performed at the Op ra de Monte-Carlo in 1937.