Sultan Hassan mosque, Cairo

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 1.87 (π/96)°.
• Contains one regular 6-pointed star polygon with vertex angle of 78.75°.
• Contains one regular 8-pointed star polygon with vertex angle of 71.25°.
• There are 16 non-regular reflective tiles.
• The tiling satisfies the interlace condition and has 7 finite interlaces and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 301 polygons.

• Thesaurus Islamicus, F1796 (Carved panels) of Not specific. Personal Communication, Information sent to the author, 21 century . [pc]

• Wade photo EGY 0709
• Wade photo EGY 0713

v23