this pattern is shot from the floor of floor of Ottoman Sultan Palace,it is Yin and Yang,but in Arabic way,this pattern is first invented in Andalusia,where the Arab decorate the walls of palaces they built there about 1000 years ago.
this piece is even better than the Yin,Yang,this contemplate each other in all the direction,it fill the space of any thing,the Yin,contemplate each other in two directions only,and could fill only a circle,my best wishes, Saad.