Mosque of Sultan Hassan

• The symmetry group of the tiling is *2222 (pmm).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains one regular octagon.
• There are three non-regular reflective tiles and one reflective pair.
• The tiling satisfies the interlace condition and has no finite interlace and three infinite interlaces.
• The tiling is edge-to-edge.
• As drawn, contains about 109 polygons.

• Wade photo EGY 0717

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