Physical Graffiti is the sixth studio album by the English rock band Led Zeppelin, released on 24 February 1975 as a double album two years after the album Houses of the Holy. The band wrote and recorded eight songs at Headley Grange which, when combined, stretched the album beyond the typical length of an LP. This prompted the band to make Physical Graffiti a double album by including previously unreleased tracks from earlier recording sessions. "Physical Graffiti" was Led Zeppelin's second most commercially successful release, selling eight million copies in the United States alone
Physical Graffiti was commercially and critically successful; the album went 16x platinum in the US in 2006, signifying shipments of eight million copies.
The recording sessions for Physical Graffiti initially took place in November 1973 at Headley Grange in East Hampshire, England. Out of fifteen songs, eight were recorded over an eight month stretch; eventually, making a double album. Led Zeppelin made the decision of adding previously unreleased songs instead of dropping some. For these recordings, the band used Ronnie Lane's Mobile Studio. However, these sessions came to a halt quickly and the studio time was turned over to the band Bad Company, who used it to record songs for their eponymous debut album. In an interview he gave in 1975, guitarist and album producer Jimmy Page explained the reason for this abrupt cessation of recording:
"It took a long time for this album mainly because when we originally went in to record it, John Paul Jones wasn't well and we had to cancel the time... everything got messed up. It took three months to sort the situation out.