The fourth album (1973) which was untitled and did not feature the band on the cover, became known as either Four Symbols or Led Zeppelin Four. The 'symbols' being four runic symbols, one associated with each member of the band. This album launched Led Zeppelin into a new level as the track Stairway to Heaven became the most requested track on US radio ever. | The fourth album (1973) which was untitled and did not feature the band on the cover, became known as either Four Symbols or Led Zeppelin Four. The 'symbols' being four runic symbols, one associated with each member of the band. This album launched Led Zeppelin into a new level as the track Stairway to Heaven became the most requested track on US radio ever. |