Qaitbay mosque, North facade

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 6°.
• Contains one regular hexagon.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• There are 6 non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has two finite interlaces and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 225 polygons.

1. Thesaurus Islamicus (Qaytbay, Cairo, Egypt. North facade, Lintels over third and fourth segments from the East) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1475AD, 879AH)
2. Archnet, Williams collection (Amir Qijmas al-Ishaqi, Cairo, Egypt. Marble inlay panels above entrance) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1480AD, 885AH)
3. Photo by David Wade: EGY 0831 (Amir Qijmas al-Ishaqi, Cairo, Egypt) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo EGY 0831

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