Bibi-Khanym, Samarkand

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 90°.
• Contains two squares.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 205 polygons.

1. Photo by David Wade: TRA 0307 (Bibi-Khanym, Samarkand, Central Asia) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1404AD, 806AH)
2. Page 58 (top right) (Diagram, St Peter, More, Shropshire, UK) of Robert Field. Geometric Patterns from Churches and Cathedrals, Tarquin Publications, 1996. ISBN 189961813. [field2]

• Wade photo TRA 0307

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