Mosque of ibn Tulun (876-879)

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 60°.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• Contains one regular hexagon.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has no finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 283 polygons.

1. Page 236, Fig. 99f, Photo 55, top right (Ali Tusin tomb tower, Tokat, Turkey) from [bonner] (1233-4AD, 630-1AH)
2. Photo by David Wade: TUR 0132 (Eski Mosque, Edirne, Turkey) from [wadei] (1414AD, 816AH)
3. (Fatehpur Sikri, Turkish Sultana's House, India) from [smith2] (1571AD, 978AH)
4. Page 56 (Sultan Ahmed Mosque, Istanbul, Turkey) from [field4] (1609-16AD, 1018-25AH)
5. Photo by Brian McMorrow (Khiva, Tosh Hovli Palace, Central Asia) from [pc] (1832AD, 1248AH)
6. Figure 197, page 200 (Cairo, Example of Pierced Windows (Qamariyyah) After Prisse d'Avennes, No colouring) from [briggs]
7. Figure 52, Plate 29 (Friday mosque, Varzaneh, Iran) from [elsaid]
8. Photo by David Wade: EGY 0334x (Ahmad Ibn Tulun, Cairo, Egypt) from [wadei]
9. Photo by David Wade: TRA 0303 (Shah-i-Zinda, Samarkand, Central Asia) from [wadei]
10. Plate 157 (Morocco, Tin-glazed earthenware mosaic) from [humbert]
11. Vol1 page 147, bottom (Tata Shah Jehan mosque, Pakistan,) from [iran]

• Wade photo TUR 0132
• Wade photo EGY 0334x
• Wade photo TRA 0303

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