Le droit d'aînesse ("The Birthright") is an opéra bouffe, a form of operetta, in three acts by Francis Chassaigne with a French libretto by Eugène Leterrier and Albert Vanloo. It premiered in Paris in 1883. An English-language version titled Falka (after the name of the principal female character), with a libretto translated and adapted by Henry Brougham Farnie, was successfully premiered in London later that year followed by productions throughout the English-speaking world.
Le droit d'aînesse was first performed on 27 January 1883, at the Théâtre des Nouveautés in Paris, directed by Jules Brasseur with a cast featuring Marguerite Ugalde, Jean-François Berthelier, Juliette Darcourt, Albert Brasseur and Eugène Vauthier.
Falka, the English version of Le droit d'aînesse, with Leterrier and Vanloo's libretto translated and adapted by Henry Brougham Farnie, was first produced at the Comedy Theatre in London on 29 October 1883. Violet Cameron performed the title role of Falka, Harry Paulton was Folbach, and W. S. Penley was Brother Pelican. It ran at the Comedy for 157 performances. Charles Manners later played Boleslas, and Giulia Warwick played the title role on tour. It was revived at the Avenue Theatre in 1885, still starring Cameron, with Hayden Coffin and E. J. Lonnen.Falka also enjoyed successful productions in Australia, New Zealand and the United States, including 1884 and 1900 productions on Broadway. The first of these, at the Casino Theatre, starred J. H. Ryley.