Opart, originally from the 2013 Art Collection, is inspired by the famous Dutch graphic artist M.C. Escher. Escher was a master in creating tessellates designs. A tessellation is a highly symmetrie edge-to-edge tiling made up of regular polygons, all of the same shape. (There are only three regular tessellations: those made up of equilateral triangles, squares, or regular hexagons).