Bourgoin, Plate 53

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 9°.
• Contains one regular pentagon.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are 8 non-regular reflective tiles (including 3 kites).
• The tiling satisfies the interlace condition and has three finite interlaces and no infinite interlace with non-straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 381 polygons.

1. Page 519, Figure 50 (Drawing from Bourgoin) of A. F. Calvert. Moorish remains in Spain, London, New York, J. Lane, Pressmark 18.F.85, 1906. [calvert] {586 pages} Available on Internet.
2. Page 53 (No exact source known) of J Bourgoin. Arabic Geometrical Pattern and Design, Dover, 1879. ISBN 048622924. [bourgoin] {Classical book of around 200 hand-produced patterns, in back and white.} Fuller version available on Internet.

• Wade photo BOU 053

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