Mosque of ibn Tulun, Cairo

Widely used with varying proportions.

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains one square.
• There is one non-regular reflective tile.
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 115 polygons.

1. Internet photo (Khirbat al-Mafjar, near Jericho) from [pc] (724-43AD, 105-24AH)
2. Photo by David Wade: EGY 0201x (Ahmad Ibn Tulun, Cairo, Egypt) from [wadei] (876-9AD, 261-4AH)
3. Figure 9, top left, page 7 (Portugal) from [gands] (15th century AD)
4. (Fatehpur Sikri, Rajah Birbal's House, India) from [smith2] (1571AD, 978AH)
5. IS.1052:15-1883 (Agra, India. Drawing) from [vami]
6. Page 221 (Different proportions) from [abas]
7. Photo craft images /Alamy (Jodhpur, India. Old city Singhvis Haveli traditional Rajasthani, coloured glass window) from [pc]
8. Pl 169 (a,b,c,d,e) (Roman Mosaic, Pompei, Acholla, Corinthe, Nea Paphos, Zahrani) from [balmelle]

• Wade photo EGY 0201x
• V&A record One of twenty-nine drawings...

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