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 22.5°.
• Contains one regular two-pointed star polygon with vertex angle of 45°.
• Contains 8 regular 8-pointed star polygons with vertex angle of 90°.
• There are 12 non-regular reflective tiles (including one kite and one dart).
• The tiling satisfies the interlace condition and has three finite interlaces and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 1582 polygons.

1. Photo from Nick Crossling (Ben Youssef Madrasah, Marrakesh, Morocco) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

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