Stevens, Page 236

• The symmetry group of the tiling is 22X (pgg).
• All the internal angles of the constituent polygons are a multiple of 45°.
• There is one non-regular reflective tile and one reflective pair.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 69 polygons.

• Page 236, Figure 26.6b (Italy early 16th century) of Peter S Stevens. Handbook of regular patterns: an introduction to symmetry in two..., MIT Press, 1984. ISBN 026269088. [stevens] {Illustrations in black and white}

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