~ Angels and demons in surreal harmony ~

M. C. Escher, was a Dutch graphic artist who made mathematically inspired woodcuts, lithographs, and mezzotints.

His work features mathematical objects and operations including impossible objects, explorations of infinity, reflection, symmetry, perspective, truncated and stellated polyhedra, hyperbolic geometry, and tessellations.

https://en.wikipedia.org/wiki/M._C._Escher

~ M.C Escher - Circle Limit IV ~