Ceiling, Amir Taz Palace, Cairo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains four regular octagons.
• There are two non-regular reflective tiles (including one dart).
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 235 polygons.

1. Creswell Archive, Photo ICR0273 (Amir Taz, Cairo, Egypt. Ceiling, Archnet, B and W print) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

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