The Mysteries of Eleusis, one of the most mysterious and revered sacred celebrations of the ancient world, has attracted in the past decades the attention of the likes of Albert Hoffmann and Terence McKenna, who have widely shared their belief that at the core of the Mysteries was a psychedelic-like experience. This has sparked the imagination of those who have seen the potential of proving that at the core of western culture lies a well-kept secret of a group initiation into altered states of c…