Roman mosaic, Ostie

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 90°.
• There are one non-regular reflective pairs and no tiles with no mirror image.
• 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.
• As drawn, contains about 135 polygons.

1. Pl 188 (b) (Ostie) of Catherine Balmelle .... Le décor géométrique de la mosaïque romaine, Paris, Picard, 2002. ISBN 270840624. [balmelle] {2 vols}

• Monohedral tilings with symmetry p4g

Photo?

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