The golden ratio & Fibonacci numbers
Since the time of the greeks the golden ratio is known, at first it was mentioned
in the 13 books of Euclid´s Elements several hundert years before ours calendar,
after that it was also known in the Middle Ages from Leonardo of Pisa (Fibonacci).
Fibonacci numbers are an number sequence which always add the last 2 numbers
together and so on, when it climbed higher it´s getting closer to the great Phi or
to an irrationally numerical value the golden ratio.
The most artists take care of this proportion, which gave a better
view to the pieces of art then a centered or even misplaced style.