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A rosette with dihedral symmetry of type D4 on the clapper of a main gate in Porto (Portug...
A hub with a dihedral symmetry group, a D5 group - if you ignore a few things …
A hub with a dihedral symmetry group, a D6 group. We can compare it with another hub; or ...
In Via Caccianino, in Milan, a rosette with a dihedral symmetry group of type D7.
Un rosone con simmetria diedrale, di tipo D8, sul soffitto della sala da pranzo di un albe...
A rosette with dihedral group of symmetry of type D16 (or D8 if we consider the external p...
Un rosone con una (approssimativa) simmetria diedrale di ordine 18 sulla facciata di una f...
This decoration of the Duomo in Troia (Foggia) is an example of rosette with dihedral symm...
A lace with dihedral symmetry of type D12.You can see an other one.
The decoration on this piece of furniture in the castle of Gruyères (Switzerland) represe...
dihedral