The first one can be seen either way. For me, I saw a vase first. In all of the pictures, the black drawing is considered the positive space and the white background behind it is considered to be the negative space. If you look at the vase picture again and imagine the background to be the black portion, you see two faces.
Hope this helps! :)
The more unbalance the more interesting people find it. If it's all symmetrical the eye won't be drawn anywhere in particular .
Answer:
Let some one know or bye a new one
Explanation:
Generally,the vitrage,or stained glass technique was used to convey an idea of other worldliness. When a person would enter the cathedral,the light would shine through the windows and illuminate the interior,causing a colourful ambient that would leave the person feeling as though they had entered another world;the world of God. The principle in the Byzantine age was the same,except it was more so to signify the god like attributes of the rulers themselves.