The rose window in the south transept  
			 
			 
			 
			 
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			Country: Spain 
			 
			 
			Date: C133 
			 
			 
			Symmetry symbol:10mm 
			 
			 
			Symmetry comment: 10mm doubling to 20 divisions on the outer layer. From the interior of the cathedral it would appear
			to be 20mm - but the exterior photo shows the true symmetry  | 
		
			 Burgos,Cathedral 
			  
			link to scientific article about this window and circular symmetryi
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