Field, Roman Mosaics, page 9

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 90°.
• Contains 6 squares.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 142 polygons.

• Page 9 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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