The Golden Ratio
Perhaps the most important link between nature and art is the concept of The Golden Ratio.
The Golden Ratio is a number aproximately equal to 1.618 and is derived from forms found throughout nature. It relates to geometry, art, architecture and many other fields.
It began during the Renaissance in literature written about aesthetics and it is here that the concept was developed. Since this many artists and designers have used the golden ratio in aspects of their work as they believe it makes the most beautiful and visually pleasing shapes.
It appears in many buildings and works of art. Perhaps the best architectural example of this is The Parthenon in Rome.