Roman mosaic, Cherchel

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains two squares.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 100 polygons.

1. Page 81, middle (Bahia Palace, Marrakesh, Morocco) from [degeorge2] (19th century AD)
2. Page 3 (top) from [cahier]
3. Pl 161 (a) (Cherchel) from [balmelle]
4. Uniform Star Polygons with Digons from [wich2]
5. figure 2.5.7 (b) on page 88 from [gands]

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