Mosque of ibn Tulun, Cairo

• 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 6-pointed star polygon with vertex angle of 60°.
• There are three non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 197 polygons.

1. Photo by David Wade: TUR 0536 (Agzikara Han, Turkey) from [wadei] (1192AD, 587AH)
2. Part 4. Plate LXXXVIII (Fatehpur Sikri, Small Masjid by the Terah Daraza, India) from [smith2] (1581AD, 989AH)
3. Page 118, photo 70 (Mausoleum, Tughluq Temur, Huocheng, China) from [bonner]
4. Photo by David Wade: EGY 0221x (Ahmad Ibn Tulun, Cairo, Egypt) from [wadei]
5. Vol2, page 46, underneath arch (Friday mosque, Natanz, Iran) from [iran]

• Wade photo EGY 0221x
• Wade photo TUR 0536
• V&A record Plaster cast

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