Najjarin fountain, medina of Fez

• 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 two regular two-pointed star polygons with vertex angle of 45°.
• Contains five regular 8-pointed star polygons with vertex angle of 90°.
• There are 17 non-regular reflective tiles (including one kite and one dart).
• 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 930 polygons.

1. Page 84, Fig 3.56 (Najjarin fountain, medina, Fez, Morocco. (part)) of Eric Broug. Islamic Geometric Design, Thames and Hudson, 2013. ISBN 978050051695. [broug2] {Many excellent photos}

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

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