Stiffelio is an opera in three acts by Giuseppe Verdi, from an Italian libretto by Francesco Maria Piave. The origin of this was the novel Le pasteur d’hommes, by Émile Souvestre, which was published in 1838. This was adapted into the French play Le pasteur, ou L'évangile et le foyer by Souvestre together with Eugène Bourgeois. That play was in turn translated into Italian by Gaetano Vestri as Stifellius; this formed the basis of Piave's libretto.

Giuseppe Fortunino Francesco Verdi was an Italian composer best known for his operas. He was born near Busseto to a provincial family of moderate means, receiving a musical education with the help of a local patron, Antonio Barezzi. Verdi came to dominate the Italian opera scene after the era of Gioachino Rossini, Vincenzo Bellini, and Gaetano Donizetti, whose works significantly influenced him.