Royal Mosque, Isfahan

• The symmetry group of the tiling is 2222 (p2).
• Contains two regular five-pointed star polygons with vertex angle of 36°.
• Contains one regular 10-pointed star polygon with vertex angle of 108°.
• There is one non-regular reflective tile and four tiles with no mirror image.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 283 polygons.

1. Page 325, Fig 230 (Lower Maqam Ibrahim citadel, Aleppo, Syria) from [bonner] (1230AD, 627AH)
2. Page 101 (Friday mosque, Yazd, Iran. Prayer hall) from [degeorge2] (1325-34AD, 725-34AH)
3. Photo by David Wade: IRA 0212 (Royal Mosque, Isfahan, Iran) from [wadei] (1611AD, 1020AH)
4. Photo by David Wade: IRA 0921 (Isfahan, Iran) from [wadei]

• Wade photo IRA 0212
• Wade photo IRA 0921

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