Some of the details about Fibonacci and the Golden Ratio may not be quite right, but, nevertheless, an interesting post about the golden ratio in relation to logo design.
FYI, the golden ratio was known at the time of the Ancient Greeks. Euclid, in his Elements, gave the first recorded definition of the golden ratio. Fibonacci wrote about the numerical series now named after him in his Liber Abaci: the ratio of sequential elements of the Fibonacci sequence approaches the golden ratio asymptotically. Another renaissance man, Luca Pacioli, defined the golden ratio as the “divine proportion” in his Divina Proportione. A century later, Michael Maestlin published the first known approximation of the (inverse) golden ratio as a decimal fraction. Then Johannes Kepler proved that the golden ratio is the limit of the ratio of consecutive Fibonacci numbers.