Great Mosque of Divrigi, Sivas

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains three squares.
• There is one non-regular reflective tile and one tile with no mirror image.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 81 polygons.

1. Photo from Archnet (Great Mosque of Divrigi, Sivas, Turkey) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1887AD, 1304AH)

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