Golden Ratio


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There is one thing that ancient Greeks, Renaissance artists, a 17 th century astronomer and 21 st century architects all have in common – they all used the Golden Mean , otherwise known as the Golden Ratio, Divine Proportion, or Golden Section.  Precisely, this is the number 1.61803399, represented by the Greek letter Phi, and considered truly unique in its mathematical properties, its prevalence throughout nature, and its ability to achieve a perfect aesthetic composition.

According to astrophysicist Mario Livio:


In mathematics and the arts, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. When the Golden Mean is conceptualised in two dimensions it is typically presented as a regular spiral that is defined by a series of squares and arcs, each forming “Golden Rectangles”.

This symbolic potential arises because of the way the mean’s spiral shape resembles growth patterns observed in nature and its proportions are reminiscent of those in human bodies. Thus, these simple spirals and rectangles, which served to suggest the presence of a universal order underlying the world, were thereby dubbed “golden” or “divine”.

The Golden Ratio in History

The golden ratio has fascinated Western intellectuals of diverse interests for at least 2,400 years. The earliest known monuments believed to have been built according to this alluring number are the statues of the Parthenon in Greece, dating back between 490 and 430 BC.  However, there are many who have argued that it goes back much further than this and that the Egyptians were well versed in the properties of this unique number .

According to some historians, the Egyptians thought that the golden ratio was sacred.  Therefore, it was very important in their religion.  They used the golden ratio when building temples and places for the dead.  In addition, the Egyptians found the golden ratio to be pleasing to the eye.  They used it in their system of writing and in the arrangement of their temples.  The Egyptians were aware that they were using the golden ratio, but they called it the "sacred ratio."

The first recorded definition of the golden ratio dates back to the period when Greek mathematician, Euclid (c. 325–c. 265 BC), described what he called the "extreme and mean ratio". However, the ratio’s unique properties became popularised in the 15 th century when aesthetics were a vital component of Renaissance art and geometry served both practical and symbolic purposes.  As the famous mathematician, astronomer, and astrologer, Johannes Kepler (1571 – 1630) wrote:


The Golden Ratio in Architecture

Many artists and architects have proportioned their work to approximate the golden ratio, with the belief that the outcome will be more aesthetically pleasing.  Using any of these ratios, an architect can design a door handle that has a complementary relationship to its door, which in turn has a similar relationship to its enclosing wall, and so on.  But more than this, the golden ratio has been used for the façade of great buildings from the Parthenon to the Great Mosque of Kairouan and all the way through to modern landmarks such as the Sydney Opera House and the National Gallery in London.

The Golden Ratio in Nature

Perhaps what is most surprising about the Golden Ratio is that it can be seen as a naturally occurring phenomenon in nature.   The golden ratio is expressed in the arrangement of branches along the stems of plants and the veins in leaves.   It can be seen in the skeletons of animals and humans and the branching of their veins and nerves.  It can even be seen in the proportions of chemical compounds and the geometry of crystals. Essentially, it is all around us and within us and for this reason, German psychologist Adolf Zeising (1810 – 1876) labelled it a ‘universal law’:


Justbod's picture

I have loved this subject for years, and always wanted to study it further - I find it absolutely fascinating!

Thanks for the article and links!





The golden ratio is everywehre in nature and architecture. It is found throught the Great Pyramid of Giza, and throughout a lot of structures in what is now South America. There seems to be something so profound in this number, it has mafe the pyramids in Egypt earthquake proof.


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