Led Zeppelin put out the album Physical Graffiti in 1969.
Although the group was initially unpopular with critics , they achieved significant commercial success with albums such as Led Zeppelin -LRB- 1969 -RRB- , Led Zeppelin II -LRB- 1969 -RRB- , Led Zeppelin III -LRB- 1970 -RRB- , Led Zeppelin IV -LRB- 1971 -RRB- , Houses of the Holy -LRB- 1973 -RRB- , and Physical Graffiti -LRB- 1975 -RRB- .	Led Zeppelin	Led Zeppelin (album)	Led Zeppelin II	Led Zeppelin II	Led Zeppelin III	Led Zeppelin III	Led Zeppelin IV	Led Zeppelin IV	Houses of the Holy	Houses of the Holy	Physical Graffiti	Physical Graffiti
Physical Graffiti is the sixth studio album by the English rock band Led Zeppelin , released as a double album on 24 February 1975 by their newly founded imprint label Swan Song Records .	Led Zeppelin	Led Zeppelin	Swan Song	Swan Song Records	Swan Song Records	Swan Song Records
