Window grill from the Yemen

T00366 = data14/P31B

data14/P31B (Click on image for high-quality PDF version)

Geometry

The symmetry group of the tiling is *442 (p4m).
All the internal angles of the constituent polygons are a multiple of 45°.
Contains four squares.
There are three non-regular reflective tiles.
The tiling does not satisfy the two-colour condition.
The tiling is edge-to-edge.
As drawn, contains about 213 polygons.

References

Publications referenced:

Page 31 bottom (Window grill from the Yemen) of Robert Field. Geometric Patterns from Islamic Art and Architecture, Tarquin Publications, 1998. ISBN 189961822. [field4]

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