Hanging Church, Cairo

• The symmetry group of the tiling is 2*22 (cmm).
• All the internal angles of the constituent polygons are a multiple of 36°.
• Contains 6 regular two-pointed star polygons with vertex angle of 72°.
• Contains three regular pentagons.
• Contains one regular 10-pointed star polygon with vertex angle of 72°.
• There are 9 non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has 6 finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 569 polygons.

1. Sprague Photo (Hanging Church, Cairo, Egypt. Entrance) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

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