Greek Architecture

Proportions in Greek and Renaissance Art
Golden Rectangles
A Golden Rectangle is a rectangle in which the longer side is 1.618 times the shorter side, and the
shorter side is 0.618 times the longer side. Many shapes in nature fill a golden rectangle. A spruce
tree has golden proportions in height and width. The dragonfly s wingspan length to his body length
is a golden proportion.

Spruce tree

Golden Proportions
A proportion is the relation of one part to another. In a golden proportion, one length is 0.618 times
the other length. The exact formula is:
1 5
It can also be found from the Fibonacci numbers (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377,
610,…). Dividing Fibonacci numbers (number gets closer and closer to the golden proportion):
1 1 = 1
1 2 = 0.5
2 3 = 0.667
3 5 = 0.6
5 8 = 0.625
8 13 = 0.615
13 21 = 0.619
21 34 = 0.618

Golden Proportions In Greek and Renaissance Art
Since the Ancient Greek times, artists have regarded the golden proportion as one of ideal beauty. It
can be found throughout in paintings (like the Mona Lisa, sculptures, and architecture (like the
Parthenon ). An easy way to quickly measure golden ratios is to use the Fibonacci numbers in
some measuring unit like centimeters or inches.

The following is quoted and paraphrased from
As the main requirements of beauty Aristotle puts forward an order, proportionality and limitation in
the sizes.

Consequences in Greek Architecture building constructed on the basis of the golden section:
??? The antique Parthenon
??? “Canon” by Policlet, and Afrodita by Praksitle
??? The perfect Greek theatre in Epidavre and
the most ancient theatre of Dionis in
The theatre in Epidavre is constructed by Poliklet to the 40th Olympiad. It was counted on 15
thousand persons. Theatron (the place for the spectators) was divided into two tiers: the first one
had 34 rows of places, the second one 21 (Fibonacci numbers)! The angle between theatron and
scene divides a circumference of the basis of an amphitheater in ratio: 137?°,5 : 222?°,5 = 0.618
(the golden proportion). This ratio is realized practically in all ancient theatres.
Theatre of Dionis in Athens has three tiers. The first tier has 13 sectors, the second one 21
sectors (Fibonacci numbers)!. The ratio of angles dividing a circumference of the basis into two
parts is the same, the golden proportion.
From the Fibonacci series: 5, 8, 13 are values of differences between radiuses of circumferences
lying in the basis of the schedule of construction of the majority of the Greek theatres. The
Fibonacci series served as the scale, in which each number corresponds to integer units of
Greeks foot, but at the same time these values are connected among themselves by unified
mathematical regularity.
At construction of temples a man is considered as a “measure of all things: in temple he should enter
with a “proud raised head “. His growth was divided into 6 units (Greek foots), which were
sidetracked on the ruler, and on it the scale was put, the latter was connected hardly with sequence of
the first six Fibonacci numbers: 1, 2, 3, 5, 8, 13 (their sum is equal to 32=25). By adding or
subtracting of these standard line segments necessary proportions of building reached. A six-fold
increase of all sizes, laying aside of the ruler, saved a harmonic proportion. Pursuant to this scale
also temples, theatres or stadiums are built.

Golden Spirals
Make a small square. Then make a set of squares in which the length of the next size square is 1.618
times the length of the last square. The easiest way is to use the Fibonacci numbers — make one 1
cm on a side, then 2, 3, 5, 8, up to 55 cm on a side.

Draw a quarter circle in each square. Use a compass to make them exact.

Then arrange the squares to form a golden spiral.

There are many examples of golden spirals in nature — shells, horns of mountain sheep, ferns, pine
cones, pussy willows, elephant tusks, some spider webs, sea horse tails, hurricanes, and galaxies to
name a few.

Examples on the application of the Golden Section in Greek Architecture: