"The idea of 'Stairway,'" says Page, "was to have a piece of music, a composition, whereby it would just keep unfolding into more layers and more moods.

"The whole subtlety and intensity of the overlay would actually accelerate as it went through every level - every emotional level, every musical level. And so it keeps opening up, as it continues through these patterns."

The classic song will be rereleased later this month as part of the upcoming expanded reissue of their 1971 release, "Led Zeppelin IV", due on October 28.

The group are releasing both "Led Zeppelin IV" and "Houses Of The Holy" on the same day. Led Zeppelin kicked off their reissue series in June with the release of expanded editions of the band's first three albums - "Led Zeppelin I", "Led Zeppelin II" and "Led Zeppelin III" - each with a companion disc of bonus material.