Anna Bolena is an Italian opera in two acts. Gaetano Donizetti wrote the music to a libretto by Felice Romani. The opera was first performed in Milan, on December 26, 1830. "Anna Bolena" was Donizetti's thirty-third opera. It was his first major success, and the work that established his reputation in Europe. The opera was long neglected until it was revived to great acclaim by Maria Callas at La Scala in Milan in 1957. It has since been regularly performed, notably by Joan Sutherland, Montserrat Caballé and Beverly Sills.