There are no secrets in the Great Pyramid. Nothing is hidden. In fact, the key was left out front, embedded in a small object discovered at the base of the pyramid. By summoning the information invested in the geometry and measure of this key, Mr. Pietsch unlocks the whole pyramid. He demonstrates how the concept of a Philosopher's Stone is realized in the artifact and how 5,000 years later, we can engage with the mind of the architect who designed the pyramid.