Door of Great Mosque, Damascus

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains two squares.
• Contains one regular 8-pointed star polygon with vertex angle of 90° - composed of kites.
• Contains one regular 8-pointed star polygon with vertex angle of 45°.
• There are three non-regular reflective tiles (including one kite) and one reflective pair.
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 175 polygons.

1. Page 48, Fig 2.20 (Great Mosque, Damascus, Syria. Door,(top pattern)) of Eric Broug. Islamic Geometric Design, Thames and Hudson, 2013. ISBN 978050051695. [broug2] {Many excellent photos}

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