The "Vitruvian man" by Leonardo da Vinci is a study of how a human figure can be fitted into two geometric shapes, the circle and the square.

The term Renaissance man or woman or polymath is used for a very clever person who is good at many different things. The idea comes from a time of history called the Renaissance which lasted from about 1400 to about 1600. One of the most famous people alive during this time was Leonardo da Vinci. He was most famous as a painter, but he was also a scientist, engineer and mathematician. Leonardo is called a "Renaissance man". Another "Renaissance man" was Michelangelo, who was a sculptor, painter, architect and poet.