Qaytbay mosque

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 2°.
• Contains one regular 6-pointed star polygon with vertex angle of 76°.
• Contains one regular 9-pointed star polygon with vertex angle of 92°.
• There are 7 non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 348 polygons.

1. Photo by David Wade: EGY 1405 (Qaytbay, Cairo, Egypt) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1474AD, 878AH)
2. Source of Bourgoin, plate 108 (Qaytbay, Cairo, Egypt) of Jules Bourgoin. Les arts arabes, Morel, Paris, 1873. [bour0] {Earlier work of Bourgoin} Available on Internet.

• Wade photo EGY 1405
• Wade photo BOU 108

• Tilings not constructible by straightedge and compass

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