Leonardo's anatomical studies have seriously and bring the knowledge that went against the traditional theories of Vitruvius (Vitruvius) Roman Empire era architects which describe the structure of the human factor in detail, summarized that. It will fit in the picture frame, circle, and square as the homo ad circulum and homo ad quaratum (the people in the circle – the people in the square) until the image can be created to pull the Vitruvian Man unabated.