al-Mar'a mosque, Cairo

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 4.5°.
• Contains three regular pentagons.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are 9 non-regular reflective tiles (including 3 kites).
• The tiling satisfies the interlace condition and has four finite interlaces and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 221 polygons.

1. Page 295, Fig 183 (al-Mar'a mosque, Cairo, Egypt) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}(1468-9AD, 872-3AH)

• V&A record Photograph -

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