Knots Colour , by m c escher , 1965 , tessellation , Op Art style , Snake, Reptile, Scaled reptile, Python, Serpent, Colubridae
A drawing of a circle with a knot in the middle.
A drawing of three circles. The circle in the middle is made of metal. The metal is brown. There are two circles that are made of brown metal. There is a white background behind the circles. 