Porgy and Bess () is an English-language opera by American composer George Gershwin, with a libretto written by author DuBose Heyward and lyricist Ira Gershwin. It was adapted from Dorothy Heyward and DuBose Heyward's play Porgy, itself an adaptation of DuBose Heyward's 1925 novel Porgy. Porgy and Bess was first performed in Boston on September 30, 1935, before it moved to Broadway in New York City. It featured a cast of classically trained African-American singers—a daring artistic choice at the time.
https://en.wikipedia.org/wiki/Porgy_and_Bess