Western tomb tower, Kharraqan

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 15°.
• There are four non-regular reflective tiles (including 2 kites).
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 317 polygons.

1. Plate 18 (Western tomb tower, Kharraqan, Iran) of Sonia P, Seherr-Thoss. Design and color in Islamic architecture; Afghanistan, Iran, Turkey, Smithsonian Institution, 1968. [seherr] {312p}(1093AD, 485AH)

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