Friday mosque, Yazd

• The symmetry group of the tiling is 3*3 (p31m).
• All the internal angles of the constituent polygons are a multiple of 10°.
• Contains two equilateral triangles.
• Contains two squares.
• Contains one regular 9-pointed star polygon with vertex angle of 120°.
• There are two non-regular reflective tiles (including one kite).
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 317 polygons.

1. Vol5, page 125 (Friday mosque, Yazd, Iran. Ceramic mosaic) of Mahmood Maher al-Naqsh. Design and execution of drawing in Iranian tilework, Islamic period, Reza Abbasi Museum, 1983. [iran] {Good collection of Iranian patterns, text in Persian} Available on Internet.

• Tilings not constructible by straightedge and compass

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