Ben Youssef Madrasah, Marrakesh

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 7.5°.
• Contains two regular two-pointed star polygons with vertex angle of 45°.
• Contains three regular 8-pointed star polygons with vertex angle of 90°.
• Contains one regular 16-pointed star polygon with vertex angle of 45°.
• Contains one regular 24-pointed star polygon with vertex angle of 30°.
• There are 22 non-regular reflective tiles (including 5 kites and one dart) and four reflective pairs.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 1877 polygons.

1. Wade photograph MOR 1237 (Ben Youssef Madrasah, Marrakesh, Morocco) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1565AD, 972AH)
2. Fig 10.13 of Brian Wichmann and David Wade. Islamic Design: a Mathematical Approach, Springer, 2017. ISBN 978-3-319-69. [ww] {}

• Wade photo MOR 1237

• Large stars
• Tiling with three or more proper stars

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