"In Western Culture, starting from Phidias and the Parthenon, the Golden Section and the Golden Number are present, consciously or unconsciously, in very famous works. In the Renaissance, after the rediscovery of Fibonacci, it was a symbol of aesthetic perfection to be used in architecture and art with, among others, Leonardo da Vinci (1542-1519) and Albrecht Dürer (1471-1528). The Golden Number is in many geometric figures making them Golden. We have it among other things in the octagonal architecture of Castel del Monte. The Golden Ratio enters the pentagon which is Golden because the side of the star and the side of the pentagon are in the ratio of 38% and 62%, as required by the Golden Number."