Stonehenge is an enigma. Its secrets continue to elude modern archaeologists. However, only forty years ago the designs were almost uncovered. Scientists with impeccable credentials wrote best-selling books and made TV documentaries revealing astonishing theories. It was an astronomical observatory. It was built by prehistoric Einsteins who understood Pythagorean triangles incorporating these into the design using a constant unit of measurement. They were highly organised surveyors, engineers, scientists and theologians. Scientists at the time produced compelling evidence to support these findings. Now they are virtually unknown. This book investigates further with very surprising results. The elusive code is now almost cracked.