Successive Golden Rectangles dividing a Golden Rectangle into squares
(Great Wall).
The Golden Rectangle and the
Great Wall of China
A golden rectangle
is a rectangle whose side lengths are in the golden ratio, onetophi, that is, approximately 1:1.618.
A distinctive feature of this shape is that when a square section is removed, the remainder is another golden rectangle, that is, with the same proportions as the first. Square removal can be repeated infinitely, which leads to an approximation of the golden
or Fibonacci spiral.
Fibonacci numbers
(0,1,1,2,3,5,8,13,21,34...) are a sequence of numbers named after Leonardo of Pisa, known as Fibonacci.
The first number of the sequence is 0, the second number is 1, and each subsequent number is equal to
the sum of the previous two numbers of the sequence itself.
The Great Wall of China is a series of stone and earthen fortifications in China, built, rebuilt, and maintained between the 6th century BC and the 16th century to protect the northern borders of the Chinese Empire from Xiongnu attacks during the rule of successive dynasties. Several walls, referred to as the Great Wall of China, were built since the 5th century BC. The most famous is the wall built between 220–200 BC by the first Emperor of China, Qin Shi Huang; little of it remains; it was much farther north than the current wall, which was built during the Ming Dynasty.
