Ahmed el-Bordeyny

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains three squares.
• Contains one regular 8-pointed star polygon with vertex angle of 45°.
• There is one non-regular reflective tile.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 93 polygons.

1. Page 4, top (A wall mosaic from the mosque of Ahmed el-Bordeyny (17th 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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