Bourgoin, Plate 166

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 12.85 (π/14)°.
• Contains two regular heptagons.
• Contains one regular 14-pointed star polygon with vertex angle of 51.42 (2π/7)°.
• There are 7 non-regular reflective tiles (including one kite) and one reflective pair.
• The tiling satisfies the interlace condition and has no finite interlace and three infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 561 polygons.

1. Vol 2, Figure 151 (Abd al-Ghani al-Fakhri mosque, Cairo, Egypt. Minbar) from [wahhab] (1418AD, 821AH)
2. Photo by David Wade: EGY 1029 (al-Ashraf Barsbay, Cairo, Egypt) from [wadei] (1423AD, 826AH)
3. Thesaurus Islamicus M178 (Zayn al-Din Yusuf, Cairo, Egypt. Qibla wall, minbar) from [pc] (1446AD, 849AH)
4. Thesaurus Islamicus M2270 (al-Rifa'i mosque, Cairo, Egypt. Qibla wall, window in south side) from [pc] (1869-1910AD, 1286-1328AH)
5. Fig 13.6b from [ww]
6. Plate 166 from [bourgoin]
7. Sprague Photo (Hanging Church, Cairo, Egypt) from [pc]

• Wade photo BOU 166
• Wade photo EGY 1029

• Tilings not constructible by straightedge and compass

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