Bourgoin, Plate 136

• 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 9-pointed star polygon with vertex angle of 80°.
• Contains one regular 18-pointed star polygon with vertex angle of 60°.
• There are 7 non-regular reflective tiles and two reflective pairs.
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 688 polygons.

• Thesaurus Islamicus (Cairo: minbar, mosque of Qijmās Al-Isḥāqī, Egypt) of Not specific. Personal Communication, Information sent to the author, 21 century . [pc]
• Plate 136 (Drawn so that octagons are not regular) of J Bourgoin. Arabic Geometrical Pattern and Design, Dover, 1879. ISBN 048622924. [bourgoin] {Classical book of around 200 hand-produced patterns, in back and white.} Fuller version available on Internet.
• Page 218 of S J Abas and A S Salman. Symmetries of Islamic Geometrical Patterns, World Scientific, 1993. ISBN 981021704. [abas] {Very many patterns in black and white.}

• Wade photo BOU 136

• Stars with 18 points
• Tilings not constructible by straightedge and compass

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