Yes, it's a well known fact that Jimmy Page was/is deep into the occult. They were having a difficult time finishing and releasing Led Zeppelin IV when they came up with that album cover.
Page owned Boleskine House (the site of Aleister Crowley's Abramelin operations) from 1970 to 1992 and had it restored with the intention of writing music there, but actually spent very little time in it.