Brick panel from Madrasah al-Mustansiryya, Baghdad

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 15°.
• Contains one regular three-pointed star polygon with vertex angle of 105°.
• Contains one regular 12-pointed star polygon with vertex angle of 105°.
• There are five non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 311 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)

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