The Vitruvian Man is a  drawing made by the Italian Leonardo da Vinci around 1490. Moreover there are some notes based on the work of the Roman architect Vitruvius. The drawing, which is in ink on paper, depicts a man in two superimposed positions with open arms and legs and inscribed in a circle and square.

The drawing is based on the correlations of ideal human body proportions with geometry described by the ancient Roman architect Vitruvius in the Book III “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.

This image demonstrates the blend of mathematics and art during the Renaissance and demonstrates Leonardo's deep Knowledge of proportions.