I think it is colored lights illuminate the top during different occasions.
The architects who designed it actually created an "optical" illusion.
An optical illusion is a illusion affecting the visual framework and described by a visual precept that seems to contrast from the real. When we see a thing, the manner in which we see things in a particular territory varies essentially relying upon our angle and perspective. To neutralize it, numerous designers make an optical Illusion and it will invalidate the impact of the distortion.
Answer:
He used color and proportion
Explanation:
Back in England there was a king during the renaissance that loved the arts so he really helped push them. I hope this helps!