Pierre Henri and Spooky Tooth - Ceremony: An Electronic Mass
Yet another, possibly the weirdest entry in the list of Catholic-Mass-as-pop albums. This is a brainchild of the french composer Pierre Henri, the XXth century classical/avantgarde artist, known for his experimental electronic music and musique concrete works. He enlisted a british blues-rock band Spooky Tooth as studio musicians. The end product sounds kinda like Hawkwind with Stockhausen instead of Dik Mik manning the electronics. The resulting LP was marketed as a Spooky Tooth album.