Friday Mosque, Isfahan

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 20°.
• Contains one regular two-pointed star polygon with vertex angle of 40°.
• Contains one regular three-pointed star polygon with vertex angle of 20°.
• Contains one regular 6-pointed star polygon with vertex angle of 40°.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 295 polygons.

1. Page 232, Fig 95a (Friday Mosque, Sin, Iran) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}
2. Page 232, Fig 95a (Sayyida Ruqayya, Cairo, Egypt) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}
3. Page 34, photo 18 (Friday mosque, Isfahan, Iran. North-east dome chamber) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}

v54