Mosque in the Citadel, Cairo

• The symmetry group of the tiling is 22* (pmg).
• All the internal angles of the constituent polygons are a multiple of 36°.
• Contains 6 regular pentagons.
• Contains one regular 10-pointed star polygon with vertex angle of 108°.
• There are three non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 233 polygons.

1. Photo by Ayman Soliman (Qalawun, Cairo, Egypt) from [pc] (1284-5AD, 682-3AH)
2. Photo on Flickr (Muhammad Ali, Cairo, Egypt. Mosque in the Citadel) from [pc] (1830-48AD, 1246-64AH)
3. Details of set of tiles from [rigby1]
4. Fig A.13 from [ww]
5. Topkapi section from [wich2]

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