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Image: Darb-i Imam shrine spandrel

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Darb-i_Imam_shrine_spandrel.JPG ‎(646 × 431 pixels, file size: 80 KB, MIME type: image/jpeg)

Description: Girih-tile subdivision found in the decagonal girih pattern on a spandrel from the Darb-i Imam shrine, Isfahan, Iran (1453 C.E.). A subdivision rule to construct perfect quasi-crystalline tilings has been identified [1] The thick black lines demarcating girih tiles of decagon and bowtie shapes are subdivided into a smaller pattern, which can also be perfectly generated by a tessellation of girih tiles.
Title: Darb-i Imam shrine spandrel
Credit: http://www.sciencemag.org/content/315/5815/1106.full (Fig.3A)
Author: Unknown artisan, 15th century
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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