Brick panel from Madrasah al-Mustansiryya, Baghdad

See also Bourgoin, Plate 166.

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 12.85 (π/14)°.
• Contains two regular heptagons.
• Contains one regular 14-pointed star polygon with vertex angle of 51.42 (2π/7)°.
• There are 7 non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 501 polygons.

1. Page 173, Fig 6.14 (Madrasah al-Mustansiryya, Baghdad, Iraq. Brick panel) of Eric Broug. Islamic Geometric Design, Thames and Hudson, 2013. ISBN 978050051695. [broug2] {Many excellent photos}(1227AD, 623AH)
2. Page 371, Fig 287c (Bayezid Pasa mosque, Amasya, Turkey) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}(1414-9AD, 816-22AH)

• Tilings not constructible by straightedge and compass

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