The Vitruvian Man is a drawing created by Leonardo da Vinci circa 1490. It is accompanied by notes based on the work of the architect Vitruvius. The drawing, which is in pen and ink on paper, depicts a male figure in two superimposed positions with his arms and legs apart and simultaneously inscribed in a circle and square. The drawing and text are sometimes called the Canon of Proportions or, less often, Proportions of Man (Wikipedia). vitruvian-man

Golden Ratio and Art  This drawing is based on the correlations of ideal human proportions with geometry described by the ancient Roman architect Vitruvius in Book III of his treatise De Architectura. Vitruvius described the human figure as being the principal source of proportion among the Classical orders of architecture. Vitruvius determined that the ideal body should be eight heads high. Leonardo's drawing is traditionally named in honor of the architect.  (https://en.wikipedia.org/wiki/Vitruvian_Man (Wikipedia)

The human body:  The measurement of the human navel to the floor and the top of the head to the navel represents the Golden ratio.

In a previous post, "The Golden Ratio In Nature"  I pointed out how this ratio appears in many forms of nature and of science.