Plane-Filling Motif with Human Motifs , by m c escher , 1921 , tessellation , Op Art style , Pattern, Symmetry
A black and white image of a star of david.
A black and white image of an octagon is outlined in black.  The octagon has eight sides.  Each side has a diamond shape in the middle.  There are eight sides of the diamond shape are outlined in white.  In the middle of the diamonds is a pattern of roses.  All of the roses are drawn in a symmetrical pattern.