Physical Graffiti is the sixth studio album by the English rock band Led Zeppelin, released as a double album on 24 February 1975. The eight new songs that Led Zeppelin recorded for their new album stretched the total time of the record beyond the typical length of a single LP, so the band decided to make Physical Graffiti a double album by including unreleased tracks from earlier recording sessions: one outtake from Led Zeppelin III, three from Led Zeppelin IV, and three from Houses of the Holy, including the unused title track.