Friday mosque, Isfahan

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 18°.
• Contains one regular 10-pointed star polygon with vertex angle of 72°.
• There is one non-regular reflective tile (including one kite) and one reflective pair.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 119 polygons.

1. Figures 123, 125 of Arthur Upham Pope. Persian Architecture, Thames and Hudson, 1965. [pope] {Good source book, but weak on geometric tiling patterns}
2. Figures 310, 311 of Derek Hill. Islamic architecture and its decoration, A.D. 800-1500..., Faber and Faber, Pressmark 35.C.183, 1964. ISBN 050051032. [hill] {With an introductory text by Oleg Grabar}
3. Photo by David Wade: IRA 0625 (Friday mosque, Isfahan, Iran) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo IRA 0625

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