Additional personnel: Ian Stewart (piano).

Recorded at Headley Grave, Hampshire, England; Olympic Studios and Islan, London, England; Stargroves, England between 1972 & 1974.

Personnel: Robert Plant (vocals, harmonica); Jimmy Page (guitar, acoustic guitar, electric guitar); Ian Stewart (piano); John Paul Jones (Mellotron, keyboards); John Bonham (drums).

Audio Mixers: Eddie Kramer; Keith Harwood.

Audio Remasterers: George Marino; Jimmy Page.

Recording information: Electric Ladyland Studio, New York, NY (1970-1974); Headley Grange, Hampshire, England (1970-1974); Island Studios, London, England (1970-1974); Olympic Studios, London, England (1970-1974); Stargroves, Hampshire, England (1970-1974); Stargroves, Newbury, Berkshire, England (1970-1974).

Illustrator: Dave Heffernan.

Photographers: Elliot Erwitt; B.P. Fallen; Roy Harper.

Led Zeppelin returned from a nearly two-year hiatus in 1975 with Physical Graffiti, a sprawling, ambitious double album. Zeppelin treat many of the songs on Physical Graffiti as forays into individual styles, only occasionally synthesizing sounds, notably on the tense, Eastern-influenced "Kashmir." With John Paul Jones' galloping keyboard, "Trampled Underfoot" ranks as their funkiest metallic grind, while "Houses of the Holy" is as effervescent as pre-Beatles pop and "Down by the Seaside" is the closest they've come to country. Even the heavier blues -- the 11-minute "In My Time of Dying," the tightly wound "Custard Pie," and the monstrous epic "The Rover" -- are subtly shaded, even if they're thunderously loud. Most of these heavy rockers are isolated on the first album, with the second half of Physical Graffiti sounding a little like a scrap heap of experiments, jams, acoustic workouts, and neo-covers. This may not be as consistent as the first platter, but its quirks are entirely welcome, not just because they encompass the mean, decadent "Sick Again," but the heartbreaking "Ten Years Gone" and the utterly charming acoustic rock & roll of "Boogie With Stu" and "Black Country Woman." Yes, some of this could be labeled as filler, but like any great double album, its appeal lies in its great sprawl, since it captures elements of the band's personality rarely showcased elsewhere -- and even at its worst, Physical Graffiti towers above its hard rock peers of the mid-'70s. ~ Stephen Thomas Erlewine

After a two-year recording gap (the longest in their recording career up to that point), Led Zeppelin followed the rampant eclecticism of HOUSES OF THE HOLY with the embarrassment of riches that is PHYSICAL GRAFFITI. One could be forgiven for thinking of this expansive double-length set as Zeppelin's WHITE ALBUM. It's a great schizophrenic beast, the first side containing the most concentrated dose of pure hard-rock energy the band had delivered since their first two albums, and the second showing off the more subtle nuances of their talent.

This is really Jimmy Page's album, from the masterfully moody Eastern setting of "Kashmir" to the poignant liquidity of "Down by the Seaside" and the furious riffing of "Trampled Under Foot." The 1950s-style rocker "Boogie with Stu" (featuring Stones pianist Ian Stewart) and the rural romp "Bron-Yr-Aur" add yet more colors to the spectrum of what may be the most emotionally satisfying album in the Led Zeppelin canon.