Roman mosaic, Trieste

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains two equilateral triangles.
• Contains one regular hexagon.
• There is one non-regular reflective tile.
• The tiling satisfies the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 335 polygons.

1. Figure 3-18d (Roman mosaic, Trieste, Italy) from [pajares]
2. Page 74 (St Maria Maggiore, Rome, Italy. With slightly different colours, 431-1750) from [hessemer]
3. Pl 206 (a) (Trieste) from [balmelle]
4. Plate XXX(18) (Byzantine ornament, Arm Coeli, Rome, Italy) from [jones]

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