Materials: Oil, bone glue and chalk on canvas.

Symbolism: Fibonacci spiral that depicts the ratios in nature, from a tree to a human being.

The painting:
Around the year 1200, Leonardo Fibonacci, an Italian mathematician, discovered a simple sequence of numbers from which ratios arise. 
The sequence of numbers: 1 1 2 3 5 8 13… ∞
For example: Ratio 8: 13
The series of numbers will eventually approach the mathematical ratio 1: 1,618