Alcazar, Seville, door

• 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 octagon.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are three non-regular reflective tiles.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 161 polygons.

1. Internet photo (Alcazar, Seville, Spain. Door) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1616AD, 1025AH)

v54