Paradise of symmetries, Alhambra palace : Documenting the seventeen theoretically possible 2D symmetries !

http://www.mi.sanu.ac.rs/vismath/blanco2011mart/BL.pdf

The question of the presence of the seventeen symmetry crystallographic groups in the mosaics and other ornaments of the Arabic palace of the Alhambra (Spain) seems to be not yet settled. We provide new evidences supporting that the answer should be positive.