Of "Porgy and Bess" and "Norma", which was produced first?
Porgy and Bess:  It was adapted from Heyward's play "Porgy", itself an adaptation of his 1925 novel of the same name. Norma (opera): Norma (] ) is a "tragedia lirica" or opera in two acts by Vincenzo Bellini with libretto by Felice Romani after "Norma, ou L'infanticide" ("Norma, or The Infanticide") by Alexandre Soumet.
i don't know