Bourgoin, Plate 18

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one equilateral triangle.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• There are two non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 287 polygons.

1. Page 183 (Al-Aqsa mosque, Jerusalem. Minbar) from [singer] (1187AD, 582AH)
2. Fig, 7 (b) (Mudhafaria Minaret, Irbil, Iraq) from [cromwell4] (1190AD, 585AH)
3. Figure 511 (Great Mosque, Dunaysir, Turkey. Mihrab) from [hill] (1200AD, 596AH)
4. Photo by David Wade: SYR 0428 (Madrasah al-Zahiriye, Aleppo, Syria) from [wadei] (1217AD, 613AH)
5. Figure 516 (Zahiriyah Madrasah, Aleppo, Syria. Border round entrance, top of arch) from [hill] (1223AD, 619AH)
6. Figure 56 (Zayn al-Din Yusuf, Cairo, Egypt. Window grille) from [hill2] (1298AD, 697AH)
7. Thesaurus Islamicus (Zayn al-Din Yusuf, Cairo, Egypt. Blind lattice window on drum of dome,) from [pc] (1298AD, 697AH)
8. Dick Osseman's web site (Sifahidiye Madrasah, Sivas, Turkey, curious colouring) from [pc]
9. E.3841:6-1938 (Cairo, Egypt. Sketchbook by James Wild) from [vami]
10. Figure 196, page 200 (Cairo, Egypt. Example of Pierced Windows (Qamariyyah) After Prisse d'Avennes, No coloring in original) from [briggs]
11. Figure 5.6.5 (Without interlacing) from [gands]
12. Page 172 from [abas]
13. Page 33 from [wade]
14. Page 64 (Casa da la Condesa Lebrija, Seville, Spain) from [field4]
15. Page 86 from [wade]
16. Pages 31 (al-Hakim, Cairo, Egypt) from [hessemer]
17. Pages 31 (highly decorated: Mosaic floor Baptistery Pisa, 12th century) from [hessemer]
18. Photo by David Wade: SPA 2303/2707 (Alcazar, Seville, Spain) from [wadei]
19. Plate 18 from [bourgoin]
20. Vol 1, page 215, top from [paccard]

• Wade photo SPA 2303
• Wade photo SPA 2707
• Wade photo BOU 018
• Wade photo PIA 033
• Wade photo SYR 0428
• V&A record Sketchbook

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