Bourgoin, Plate 29

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• Contains one regular hexagon.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• There is one non-regular reflective tile.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 225 polygons.

1. Page 310 of S J Abas and A S Salman. Symmetries of Islamic Geometrical Patterns, World Scientific, 1995. ISBN 981021704. [abas] {Very many patterns in black and white, no sources given.}
2. Photo SYR 0125 (Great Mosque, Damascus, Syria) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}
3. Plate 29 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.

• Wade photo BOU 029
• Wade photo SYR 0125

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