Sutton Hoo clasp

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 90°.
• There are two non-regular reflective tiles.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 36 polygons.

1. Page 77 of J Backhouse. The Lindisfarne Gospels, Phaidon press, 1981. ISBN 071482461. [backhouse] {A few Celtic patterns in colour.} Fuller version available on Internet.

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