Great Catholic conspiracies maybe you missed, from Shrine of the Holy Whapping:

I've always had a soft spot for tacky Church consiracy novels, what I call "Cathsploitation." For once, the Church gets to be secretive, majestic, powerful, arcane, and something other than felt banners and Marty Haugen....

And so on, proceeding to a list of suggested overlooked conspiracies. Highly recommended!