Here could be some common words about tesselations, their place in culture of different countries, excursion into a history of tesselations.

Some words should be devoted to the famous Dutch artist M.C.Escher.

Basic fragments of the tesselation may have any form, but in any tesselation we can see a simple grid - geometrical basis of the ornamental design. The cells of such grid can be squares, rhombuses, parallelograms, rectangulars, regular triangles or hexagons. A type of a grid, and also the symmetries of the particular pattern's fragments determine a symmetry type of the whole pattern.