Madrasah of Sultan Sha'ban, Cairo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 3.75°.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• Contains one regular 16-pointed star polygon with vertex angle of 52.5°.
• There are 8 non-regular reflective tiles (including 3 kites) and two reflective pairs.
• The tiling satisfies the interlace condition and has no finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 763 polygons.

1. Photo by David Wade: EGY 0821 (Sha'ban Madrasah, Cairo, Egypt) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo EGY 0821

• Stars with 16 points with vertex angle not equal to 45°

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