Mosque of al-Mu'ayyad, Cairo

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 5°.
• Contains one regular 9-pointed star polygon with vertex angle of 30°.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• There are five non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has no finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 393 polygons.

1. Photo by David Wade: EGY 1216 (al-Mu'ayyad, Cairo, Egypt) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1420AD, 823AH)
2. Fig 14.6b, Fig 14.8 photo of Brian Wichmann and David Wade. Islamic Design: a Mathematical Approach, Springer, 2017. ISBN 978-3-319-69. [ww] {}

• Wade photo EGY 1216

• Tilings not constructible by straightedge and compass

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