Moulay Ishmael Mosque, Fez, Morocco

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two squares.
• Contains 6 regular two-pointed star polygons with vertex angle of 45°.
• Contains two regular four-pointed star polygons with vertex angle of 45°.
• Contains 9 regular 8-pointed star polygons with vertex angle of 90°.
• There are 12 non-regular reflective tiles (including one kite and one dart) and one reflective pair.
• The tiling satisfies the two-colour condition with straight cross-overs, but interlace counts not determined.
• The tiling is edge-to-edge.
• As drawn, contains about 1575 polygons.

1. Photo from web site: MOR 0331 (Moulay Ishmael Mosque, Fez, Morocco) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1437AD, 840AH)
2. Fig 9.11 of Brian Wichmann and David Wade. Islamic Design: a Mathematical Approach, Springer, 2017. ISBN 978-3-319-69. [ww] {}

• Wade photo MOR 0331

• Tiling whose tile angles are a multiple of 45° and whose lengths are p+q*sqrt(2).

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