If you think you know everything about the origins of Christianity, think again. There is a book that claims that the whole religion was based on a secret code for psychedelic mushrooms. In this post, I explore the book The Sacred Mushroom and The Cross by John Allegro, a scholar who claimed that Christianity was based on a secret code for psychedelic mushrooms. I explain his arguments and why they caused such a controversy. I also share some of the reactions and influences of his book among mushroom lovers, psychedelic seekers, and historians.