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 equilateral triangle.
• Contains one square.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• Contains one regular hexagon.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 139 polygons.

1. Plate 25 (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)
2. Vol1, page 138 (Gowhar Shad mosque, Mashhad, Iran) of Mahmood Maher al-Naqsh. Design and execution of drawing in Iranian tilework, Islamic period, Reza Abbasi Museum, 1983. [iran] {Good collection of Iranian patterns, text in Persian} Available on Internet.(1418AD, 821AH)
3. Photo by Bernard O'Kane (Abdallah Ansari, Gazur Gah, Herat, Afghanistan, Central Asia. Tilework from the east iwan) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1428AD, 831AH)

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