You probably have seen the picture on the left hand side, which an endless staircase is created, once in your life time. This famous pattern is done by Maurits Cornelis Escher, and it's also seen in the movie Inception, when the characters walk on the endless staircase, then suddenly they found out this kind of structure is actually a paradox.

Well, back to the artist Escher.

Escher is an artist from the Netherlands. The time of Escher is also the time of chaotic and unstable Europe. People will always be captured by his mysterious image of visual illusion, and oftentimes getting fascinated with his pieces of artworks.