This
work of art by M. C. Escher, called "Circle Limit IV," was
created using rotation tessellations and dilations. M.C. Escher uses
many geometric patterns in his works to create a mood and distinct features
that cause his works to be easily remembered.
This
work of art was found at the following site:
http://www.poster.at/Escher-MC/Escher-MC-Circle-Limit-IV-7400023.html