The seven friezes
The seven types of symmetry for a frieze: the colours on the right side shows which trasformations (apart from translations) fix the figure. The same colour identifies figures that differ for a translation; see also this black-and-white version.
The image used to appear in the posters of the exhibition Simmetria, giochi di specchi - Symmetry, playing with mirrors.
elaborazione grafica di Roberta Granà