The Vitruvian Man is a world-renowned drawing created by Leonardo da Vinci circa 1487. The drawing 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.The 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. That’s how “Leonardian” was buid as well: a quest for ideal proportions, a harmonious design springing up from a geometric “collision”, circle and square’s intersections.