Qazvin Friday Mosque

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains one square.
• Contains one regular four-pointed star polygon with vertex angle of 90° - composed of kites.
• There is one non-regular reflective tile (including one kite).
• The tiling does not satisfy the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 72 polygons.

1. Figure B 8b (Octagon-Square subdivided by Cross-bars, Luchow, Szechwan, 1850 AD) of Daniel Sheets Dye. Chinese Lattice Designs, Dover, 1937. ISBN 048623096. [dye] {Important book topic.}
2. Vol II (Friday Mosque, Qazvin, Iran) of E Booth-Clibborn. The splendour of Iran, London, 2001. ISBN 186154011. [booth] {2 vol}

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