Irbil minaret, upper pattern

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 90°.
• Contains five squares.
• There is one non-regular reflective tile.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 173 polygons.

1. Internet photo (Irbil, Iraq. Minaret, upper pattern) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

• Tiling with chelates

v54