Sifahidiye Madrasah

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 2.5°.
• Contains one regular hexagon.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• Contains one regular 9-pointed star polygon with vertex angle of 80°.
• There are five non-regular reflective tiles (including one kite).
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 272 polygons.

1. Plate 5, fig 7 (Sifahidiye Madrasah, Sivas, Turkey. Main portal) of Ögel Semra . Anadolu Selçuklulari'nin ta¸s tezyinati, Ankara: Türk Tarih Kurumu Basimevi, 1966. [ogel] {192p}

• Tilings not constructible by straightedge and compass

Photo?

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