The Golden Ratio The Story of Phi, the Extraordinary Number of Nature, Art and Beauty

What do the Parthenon in Greece, crosses in graveyards, the ratio of the height of the navel to a woman's total height, sunflowers and Leonardo da Vinci's Mona Lisa have in common? The answer is that these disparate elements share a geometrical proportion of ancient origin, commonly known as the Golden Ratio, or expressed numerically as phi.