Roman mosaic, Este

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two squares.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• The tiling satisfies the two-polygon condition.
• As drawn, contains about 105 polygons.

1. PP Class 90, [p4m,d4,d1], IH Class 70 from [dawes]
2. Page 2 (bottom) from [cahier]
3. Page 33 (Forum of Lucus Feroniae) from [field1]
4. Plate 54 from [racinet]
5. Plate XXV(left centre) (Mosaic from Pompeii and the Museum at Naples, Italy) from [jones]

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