Believe this proportion has been appearing and structures for thousands of years at places like the Pyramids of Giza in Egypt and the Parthenon in Greece the Vinci's Vitruvian man is a study of this proportion and some even say he painted the Mona Lisa using this ratio in her features with nothing more than some sticks and a cord on balaam's Engineers may have been able to measure the square root of the cross the width of the medial doorway and the interior walls the golden ratio can be in the base of the structure with the sidewall is one and the back wall is 1.618 by using repeated squares and natural proportions in the temple of the cross a beautifully calculated floor plan took shape full of geometry