patterns in medieval arts

While I was looking at the medieval artworks, I found something in common in their shape. They somehow had a uniform structure in the picture.

They thought phi proportion and geometric structure was very important. Therefore, if looking at the faces they are out of real scale but circle.

These "proportioned" and "geometric" pictures gives themselves uniformity, hence bringing flatness.

Perheps this is because of the atmosphere at the period of the time when Christianity held greatest influence thus divinity was the only significance while individuality was not.

Although phi proportion is very important in design, artists should know how to break in because too much of uniformity effect an anti-creativity.