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A pavement with symmetry of type *442 in Ponta Delgada, in Portugal.
In Lisbon, in the APM head-office (Association of Professors in Mathematics), a paving wit...
In rua de S, José, in Lisbon, this pavement has symmetry 442 (if we ignore the colouring)...
A flower of Plumbago coerulea. A photograph like this, taken from the right point of view,...
A piece of lace with dihedral symmetry group, of type D2.You can see an other one.
Friezes on a minaret in Kalta-Minor Khiva intra-muros (Uzbekistan); if we imagine to unrol...
A frieze of type *22∞ in this decoration of Islamic art in Kashgar (China).
A dihedral symmetry of type D1 in this clapper in Bergamo.From the point of view of topolo...
This Portuguese tapestry is an example of all the seven symmetry types in a frieze. From ...
