Bourgoin, Plate 164

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 25.71 (π/7)°.
• Contains one regular heptagon.
• Contains one regular 14-pointed star polygon with vertex angle of 51.42 (2π/7)°.
• There are 6 non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has no finite interlace and three infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 373 polygons.

1. Photo by David Wade: EGY 0933 (Wikala al-Ghuri, Cairo, Egypt. One of the entry doors) from [wadei] (1503-5AD, 908-10AH)
2. Page 326 from [abas]
3. Plate 164 from [bourgoin]
4. Plate 67 (French Embassy, Cairo, Egypt. Door inlaid with ivory) from [collin]

• Wade photo BOU 164
• Wade photo EGY 0933
• Wade photo EPC 084

• Tilings not constructible by straightedge and compass

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