The Vitruvian Man is a drawing by Leonardo Da Vinci which he created around 1490. It is a drawing, which is in pen and ink on paper, that depicts a man in two superimposed positions with his arms and legs apart and inscribed in a circle and square. The drawing and text are sometimes called the Canon of Proportions or, less often, Proportions of Man. This image demonstrates the blend of art and science during the Renaissance and provides the perfect example of Leonardo's deep understanding of proportion. In addition, this picture represents a cornerstone of Leonardo's attempts to relate man to nature. He believed the workings of the human body to be an analogy for the workings of the universe.

Evidence has been found that Leonardo might have been influenced by the work of Giacomo Andrea de Ferrara, a Renaissance architect, expert on Vitruvius, and close friend of his. Giacomo Andrea's original drawing has only one set of arms and legs while Leonardo's has the position of his man's arms and legs change.

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