Brick panel from Madrasah al-Mustansiryya, Baghdad

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 1°.
• Contains five regular two-pointed star polygons with vertex angle of 72°.
• Contains two regular pentagons.
• Contains one regular 10-pointed star polygon with vertex angle of 98°.
• There are five non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 311 polygons.

1. Photo from David Wade (Madrasah al-Mustansiryya, Baghdad, Iraq. Brick panel, Colour added, star to match original) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1227AD, 623AH)

Photo?

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