3.3 What Is the Difference Between the Golden Ratio and the Fibonacci Sequence?.3.2 What Is the Fibonacci Sequence Used For?.3.1 Why Is the Fibonacci Sequence So Important?.2.2.4 One Step Further: Traces of Fibonacci on the Human Body.2.2.3 The Golden Ratio in Relation to Architecture.2.2.1 De Divina Proportione and Leonardo da Vinci.2.2 Other Examples of the Fibonacci Sequence.2.1.3 Piet Mondrian and the Golden Spiral.2.1 Examples of the Fibonacci Sequence in Art.1.1 What Is the Fibonacci Sequence Used For?.