Cairo, Zawiyat al-Abbar

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 10°.
• Contains one regular 9-pointed star polygon with vertex angle of 110°.
• Contains one regular 12-pointed star polygon with vertex angle of 100°.
• There are four non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 615 polygons.

1. Vol 2, Plate 61c (al-Abbar, Cairo, Egypt) from [creswell] (1283AD, 681AH)
2. Photo by Ayman Soliman (Qalawun, Cairo, Egypt) from [pc] (1284-5AD, 682-3AH)
3. Vol 2, Plate 98b (Baybars al-Gashankir, Cairo, Egypt. Khanqah) from [creswell] (1306-10AD, 705-9AH)
4. Part 3, Plate ? (Fatehpur Sikri, The Large Baths, India) from [smith2] (1581AD, 989AH)
5. Photo by Donald Bell (Akbar's mausoleum, Sikandra, India) from [pc] (1613AD, 1022AH)
6. Page 178, Fig 6.27 (Pishtaq of the Sufi convent of Nadr Divan Begi Arlat, Bukhara, Central Asia) from [broug2] (1619-20AD, 1028-9AH)
7. Photo by David Wade: IND 0524 (Itimad-ud-Daula's Tomb, Agra, India) from [wadei] (1626AD, 1035AH)
8. E.3842:103-1938 (Cairo, Egypt. Sketchbook by James Wild) from [vami]
9. Fig 14.11c from [ww]
10. Flickr photo (Kalyan Mosque, Bukhara, Central Asia. Po-i-Kalyan) from [pc]
11. Page 130, photo 85 (Abulla Ansari, Gazargah, Afghanistan, Central Asia) from [bonner]
12. Page 133 (Iran. No location, Design frequently used in woodwork (marquetry?)) from [shafai]
13. Page 177, Fig 6.26 (Chashma-yi Ayyub, Bukhara, Central Asia. Wooden door) from [broug2]
14. Photo by David Wade: IRA 0611 (Friday mosque, Isfahan, Iran) from [wadei]
15. Photo from M Sakkal (Junblat House, Aleppo, Syria. Roundel) from [pc]
16. Photo via Aslam Qureshi (Juybori Kalon, Bukhara, Uzbekistan, Central Asia, background) from [pc]
17. Vol 1, page 80 (Location not known) from [iran]
18. Vol 2, Plate 112c (Salar and Sangar al-Gawli, Cairo, Egypt. Mihrab in courtyard) from [creswell]
19. Vol 2, Plate 116e (al-Abbar, Cairo, Egypt. 2nd mausoleum) from [creswell]

• Wade photo IRA 0611
• Wade photo IND 0524
• V&A record Sketchbook

• Tilings not constructible by straightedge and compass

v54