Alcazar, Seville

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two squares.
• Contains one regular 8-pointed star polygon with vertex angle of 45°.
• There are five non-regular reflective tiles.
• The tiling satisfies the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 271 polygons.

1. Page26, top (Alcazar, Seville, Spain. Re-drawn to make much more regular) of Robert Field. Geometric Patterns from Islamic Art and Architecture, Tarquin Publications, 1998. ISBN 189961822. [field4]

Photo?

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