Yusif ibn Kuseyir, Nakhchivan

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 7.5°.
• Contains one regular three-pointed star polygon with vertex angle of 105°.
• Contains one regular 6-pointed star polygon with vertex angle of 75°.
• There are four non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 455 polygons.

1. Fig 3 (e) (Yusif ibn Kuseyir, Nakhchivan, Azerbaijan, Central Asia) of Peter Cromwell. Islamic geometric ornament ... in Azerbaijan, To be published, 2018. [cromwell4] {}(1148AD, 542AH)

Photo?

v54