Minbar from Mosque of al-Mu'ayyad, Cairo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 3.75°.
• Contains one regular 8-pointed star polygon with vertex angle of 52.5°.
• Contains one regular 12-pointed star polygon with vertex angle of 52.5°.
• There are 6 non-regular reflective tiles (including one kite) and one reflective pair.
• 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 525 polygons.

1. Page 445, Fig. 380e (Hasan Sadaqah mausoleum, Cairo, Egypt) from [bonner] (1315-21AD, 714-20AH)
2. Photo by David Wade: EGY 1221 (al-Mu'ayyad, Cairo, Egypt. Minbar) from [wadei] (1420AD, 823AH)
3. Figure 84 from [hill2]
4. Plate 74 (inexact heptagon) from [burckhardt]

• Wade photo EGY 1221

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