Led Zeppelin’s 6th album was released February 24, 1975. I remember being fascinated at the variety of musical styles on this double album. And “Houses of the Holy” was on this album (not Houses of the Holy).
The album also contained “Kashmir”, my favorite Led Zep cut. Yes, I know “Stairway to Heaven” is the greatest rock song ever, but “Kashmir” is the acme of Zeppelin-ness.