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Un bell'orologio alla Gare d'Orsay, a Parigi.Si può confrontare con un'altra foto dello s...
astronomical observatory in Jaipur (India).">A sun-dial (of the early eighteenth century), in the a href="grande.php?ID=6542">astronomi...
A manhole cover in Paris with cyclic symmetry, of type C12.You can see an other one.
A hub with cyclic group of symmetry of type C4. We can compare it with another hub; or w...
A hub with cyclic group of symmetry of type C7 (if we ignore a few things...). We can co...
This road sign gives an example of a rosette with a dihedral symmetry (D3).
The group of symmetry of this set of arm-chairs (at the Louvre, in the reconstruction of t...
Strings of pearls photographed in a bazaar in Kashgar (China).
