Friday Mosque, Herat

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 1.5°.
• Contains one regular octagon.
• Contains one regular 8-pointed star polygon with vertex angle of 69°.
• There are three non-regular reflective tiles.
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 175 polygons.

1. Colour plate (Friday Mosque, Herat, Afghanistan, Central Asia) of Edgar Knobloch. Monuments of Central Asia.., London, I.B. Tauris, 2001. ISBN 186064590. [knobloch] {}

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