Mosaic floor, St Maria Maggiore

• The symmetry group of the tiling is 3*3 (p31m).
• All the internal angles of the constituent polygons are a multiple of 60°.
• There is one non-regular reflective tile.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 177 polygons.

1. Figure 139, called Chevron of S W Golomb. Polyominoes, Revised and expanded second edition. Princeton University Press, 1994. ISBN 069102444. [golomb1]
2. Page 76 (top right) (St Maria Maggiore, Rome, Italy. Mosaic floor, 431-1750) of F M Hessemer. Historic Designs and Patterns in Color, Dover, a1840. ISBN 048626425. [hessemer] {This collection is unusual in giving the source for almost all the patterns.} Available on Internet.

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