Led Zeppelin IV, the fourth release by the legendary hard rocking band Led Zeppelin, which contains some of their most muscular and most remembered songs of all time, including their centerpiece to many, “Stairway to Heaven,” celebrates its 45th anniversary today.

There isn’t anyone who is a fan of rock and roll in general who hasn’t crossed paths with this album at least once, whether it be the constant replay and re-re-replay of almost all the songs on the album on a daily basis on Classic Rock radio, or the various forms of media many of the songs have been included in pop culturally. It’s become a global playbook for the correct and attitudinal way to amplify the original organic blues and its become a global playbook for how to take simple chord rock and enhance it with mixtures and clovers of folk and exotic sounds, stemming from American shores like Memphis (“When the Levee Breaks”) all the way to countries like Morocco and such (“Four Sticks”).