Listening to the album that had No name. Eventually became Known as "Led Zeppelin IV" released on November 8, 1971. Changed the music world: In 2002, Spin magazine's Chuck Klosterman named it the second greatest metal album of all time and said that it was "the most famous hard-rock album ever recorded" as well as an album that unintentionally created metal—"the origin of everything that sounds, feels, or even tastes vaguely metallic". Song written by Bonham, Jones, Page, Plant. Ian Stewart on piano.