Tuesday, May 20th, 2014 — You may have never heard of the band Spirit, but Led Zeppelin has. Not only did they play shows with Zeppelin in 1969, but Spirit has also now sued them for allegedly lifting what may be one of the most famous riffs in rock history the opening notes of “Stairway to Heaven.”“Its been a long time coming,” attorney Francis Alexander Malofiy said in Bloomberg Businessweek. Malofiy is representing a trust for writer Randy California, the deceased Spirit guitarist who wrote “Taurus,” the instrumental track that appeared on the bands eponymous 1968 debut album and from which the chord progression is allegedly lifted.