Roman Mosaic, Silchester

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 90°.
• Contains 8 squares.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has one finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 240 polygons.

1. Page 11 (Silchester, UK. Thought to be a church) of Robert Field. Geometric Patterns from Roman Mosaics, Tarquin Publications, 1996. ISBN 090621263. [field1] {Gives sources of several interesting Roman patterns.}

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