Madrasah/Bimaristan of Qalawun, 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 equilateral triangle.
• Contains one regular hexagon.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• There are four non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 447 polygons.

1. Archnet photo (Imam al-Shafi'i, Cairo, Egypt. Qubba) from [pc] (1211AD, 607AH)
2. Photo from David Wade: EGY 1110 (Qalawun, Cairo, Egypt) from [wadei] (1279AD, 677AH)
3. Photo by Ayman Soliman (Qalawun, Cairo, Egypt) from [pc] (1284-5AD, 682-3AH)
4. Vol 2, page 23 (Taybars, Cairo, Egypt) from [wahhab] (1309AD, 708AH)

• Wade photo EGY 1110

• Tilings with site logo Kunda Thalatha

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