Mosaic floor, Qaytbay Madrasah

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two regular octagons.
• There is one non-regular reflective tile (including one dart).
• 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 127 polygons.

1. Photo by Ayman Soliman (Qalawun, Cairo, Egypt) from [pc] (1283-4AD, 681-2AH)
2. Page 258, Fig. 127a (Friday mosque, Yazd, Iran) from [bonner] (1324AD, 724AH)
3. BL Add. MS 11856, ff. 94v-9 (The Four Gospels in Arabic, Palestine. Gospel of Luke) from [pc]
4. E.3839:170-1938 (Cairo, Egypt. Sketchbook by James Wild) from [vami]
5. Vol2, page 124 (Qaytbay, Cairo, Egypt. Mosaic floor) from [wahhab]

• V&A record Sketchbook

• Tiling whose tile angles are a multiple of 45° and whose lengths are p+q*sqrt(2).

v54