Led Zeppelin were an English rock band formed in London in at the end of the sixties. The group consisted of vocalist Robert Plant, guitarist Jimmy Page, bassist/keyboardist John Paul Jones, and drummer John Bonham. With a heavy, guitar-driven sound, they are cited as one of the progenitors of Hard rock and Heavy metal, although their style drew from a variety of influences, including blues and folk music. Led Zeppelin have been credited as significantly impacting the nature of the music industry, particularly in the development of album-orientated rock and stadium rock. Many consider Led Zeppelin one of the most successful, innovative and influential rock groups in history.