Ashrafiyya madrasah, Jerusalem

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 18°.
• Contains 9 regular two-pointed star polygons with vertex angle of 72°.
• Contains 6 regular pentagons.
• Contains one regular 10-pointed star polygon with vertex angle of 72°.
• There are 10 non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has 8 finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 296 polygons.

1. Page 347, Fig. 258 (Ashrafiyya madrasah, Jerusalem) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}(1482AD, 887AH)

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