Qawsun, Koran
data187/DA1
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Geometry
- The symmetry group of the tiling is *442 (p4m).
- All the internal angles of the constituent polygons are a multiple of 15°.
- Contains three equilateral triangles.
- Contains one regular four-pointed star polygon with vertex angle of 60°.
- Contains one regular 8-pointed star polygon with vertex angle of 90°.
- Contains one regular 12-pointed star polygon with vertex angle of 90°.
- There are four non-regular reflective tiles (including one kite).
- The tiling satisfies the interlace condition and has three finite interlaces and no infinite interlace with non-straight cross-overs.
- The tiling is edge-to-edge.
- As drawn, contains about 619 polygons.
References
Publications referenced:
- Page 45 (Qawsun mosque, Cairo, Egypt. Decorative page of the Koran from the mosque of Qeycoun (14th century)) of Prisse d'Avennes. Arabic Art in Color, Dover, 1877. ISBN 048623658. [d-avennes] {Contains 25 geometric patterns in colour, and gives the source in most cases more on the Internet.} Fuller version available on Internet.
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