Madrasah Halawiye, Aleppo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains one regular octagon.
• Contains one regular 8-pointed star polygon with vertex angle of 45°.
• There are two non-regular reflective tiles.
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 243 polygons.

1. Photo by David Wade: SYR 0611 (Madrasah Halawiye, Aleppo, Syria) from [wadei] (1245AD, 642AH)
2. Page 140 (Sultan Khushqadam al-ahmadi, Cairo, Egypt) from [okane2] (1376-1486AD, 777-891AH)
3. Photo by David Wade: IND 0326 (Agra Fort, India) from [wadei] (1573AD, 980AH)
4. Part 4, Plate IV (Fatehpur Sikri, Friday Mosque, India) from [smith2] (1648AD, 1058AH)
5. Page 124, photo 76 (Abulla Ansari, Gazargah, Afghanistan, Central Asia) from [bonner]
6. Photo by David Wade: IRA 2320 (Shrine of Shah Ni'matuollahi, Mahan, Iran) from [wadei]
7. Table 23 (Sultan Han, Konya, Turkey) from [erdmann]

• Wade photo SYR 0611
• Wade photo IND 0326
• Wade photo IRA 2320

v54