Atabaki courtyard, Qom

• The symmetry group of the tiling is *2222 (pmm).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one regular three-pointed star polygon with vertex angle of 90°.
• Contains one regular 6-pointed star polygon with vertex angle of 90°.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 61 polygons.

1. Vol 3, Figure 94, page 86 (Atabaki courtyard, Qom, Iran. Colouring from the original except that 6-point star alternates in colour with cream) 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.

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