A rosette
One of the fifteen rosettes in the horizontal row lying in the middle of the façade of S. Maria Novella, in Florence.
You can see an other one; or you can see a drawing of the same rosette.
The symmetry type of this rosette is quite interesting: in the centre we see a dihedral symmetry type D6, while in the exterior annulus we have a dihedral symmetry type D8. GCD(8,6)=2, so on the whole we have a symmetry type D2, like the one of a rectangle.
© matematita
foto di F. Martín Casalderrey
The image belongs to the sections...:
*2. (D2) (Symmetry)
*6. (D6) (Symmetry)
*8. (D8) (Symmetry)
Decorations of walls and façades (Anthology of images)
Decorations of walls and façades (Symmetry)