Qom

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 15°.
• Contains one regular octagon.
• Contains one regular four-pointed star polygon with vertex angle of 75°.
• Contains one regular 6-pointed star polygon with vertex angle of 75°.
• There is one non-regular reflective tile.
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 78 polygons.

1. Vol 3, Figure 76, page 16 (The old courtyard and the perfumed (i.e. holy) shrine of Ma'sumeh, Iran) 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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