bellarmine & the great book giorgio would also check if the great doctor , as giorgio insist upon calling him , roberto francesco romolo bellarmine , the general inquisitor at the end of the 1500s , left a diary or journal , which was entitled theatrum festiva , montepulciano or theatrum diabolus or something to that effect , where he described his attempts to find thoth fraternitatis which , if i understand correctly , was the catholic church 's worst enemy at the time .