Royal Palace door

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 15°.
• Contains one regular hexagon.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• There are 7 non-regular reflective tiles (including one kite and one dart).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 365 polygons.

1. Photo from Nick Crossling (Alhambra, Cuarto Dorado, Spain. Window grill over middle entrance) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]
2. Volume 2, page 465 (Royal Palace, Fez, Morocco. Monumental door) of Paccard, André. Traditional Islamic craft in Moroccan architecture, Saint-Jorioz, France, 1980. ISBN 286486003. [paccard] {2 v. : ill. (some col.) ; 31 cm.}

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