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In this pattern we find no pentagons either in the underlying grid, but irregular hexagons and octagons sometimes referred to as bow-tie and bobbin shapes. These can be arranged in many different ways, with the parts of pattern they each contain corresponding nicely, as they do in the next design.
This magnificent 5-volume by Mahmood Maher al-Naqsh, published in Teheran, 1983 is now available online. It presents the most complete…