Western tomb tower, Kharraqan

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one square.
• Contains one regular two-pointed star polygon with vertex angle of 30°.
• Contains one regular 6-pointed star polygon with vertex angle of 90°.
• There is one non-regular reflective tile (including one kite).
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 166 polygons.

1. Plate 17 (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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