The cover art for Johnny Griffin's album "The Congregation" was by an American artist who was a leading figure in the visual art movement known as what?
pop art
Title: The Congregation (Johnny Griffin album)
Passage: The Congregation is an album by American tenor saxophonist Johnny Griffin recorded in 1957 and released on the Blue Note label.  It would be his last recording for the label.  The cover art was designed by Andy Warhol.
Title: Andy Warhol
Passage: Andy Warhol ( ; born Andrew Warhola; August 6, 1928 – February 22, 1987) was an American artist, director and producer who was a leading figure in the visual art movement known as pop art.  His works explore the relationship between artistic expression, celebrity culture, and advertising that flourished by the 1960s, and span a variety of media, including painting, silkscreening, photography, film, and sculpture.  Some of his best known works include the silkscreen paintings "Campbell's Soup Cans" (1962) and "Marilyn Diptych" (1962), the experimental film "Chelsea Girls" (1966), and the multimedia events known as the "Exploding Plastic Inevitable" (1966–67).
Title: Johnny Griffin (album)
Passage: Johnny Griffin (also referred to as J. G., Tenor and Johnny Griffin Quartet) is an album by American jazz saxophonist Johnny Griffin featuring tracks recorded in 1956 and released on the Argo label in 1958.  The album features the first recordings made under Griffin's leadership but was not released until 1958 by which time his first Blue Note album "Introducing Johnny Griffin" (1956) had been released and he had attracted attention as a member of Art Blakey's Jazz Messengers.
The Congregation (Johnny Griffin album) Andy Warhol