"Knockin' on Heaven's Door" is a song written by Bob Dylan from Pat Garrett & Billy the Kid, the soundtrack of the 1973 film of the same name. The song consists of four chords in the key of G major: G, D, Am7, and C. The basic pattern throughout the song is G-D-Am7-Am7 and then G-D-C-C, and this is repeated. In 2004, it was voted #190 by representatives of the music industry and press in Rolling Stone magazine's 500 Greatest Songs of All Time issue.