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tympan Darb-i Imam (2)

Topic:
Symmetry
Now we are zooming in into the lower left corner of the tympan.
Note that the lines of the big tiles intersect in the center of the blue decagons. The lines cut as well bow ties in the middle. In the picture below you can see this is the case all over the tympan.
picture tympan: Lu & Steinhardt
picture tympan: Lu & Steinhardt