Qawtawiyya madrasah, Tripoli

• 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 14-pointed star polygon with vertex angle of 51.42 (2π/7)°.
• There are 8 non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has no finite interlace and 6 infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 580 polygons.

1. Page 371, Fig 286a (Qawtawiyya madrasah, Tripoli, Lebanon) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}

• Tilings not constructible by straightedge and compass

Photo?

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