Madrasah-al-Mustansiriya

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 10°.
• Contains one regular 6-pointed star polygon with vertex angle of 100°.
• Contains one regular 9-pointed star polygon with vertex angle of 40°.
• There are four non-regular reflective tiles.
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 270 polygons.

1. Fig 82, above arch (Madrasah-al-Mustansiriya, Iraq) of Jacques Ghislain de Maussion. Damascus Baghdad : capitals and lands of the Caliphs, Beirut : Dar el-Mashreq, 1972. ISBN . [maussion] {}

• Tilings not constructible by straightedge and compass

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