Izzeddin Keykavus hospital and mausoleum, Sivas

Similar to Alhambra, Mexuar patio.

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one equilateral triangle.
• Contains one regular 12-pointed star polygon with vertex angle of 90°.
• There are three non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 193 polygons.

1. Page 245, Fig. 109d (Sifahidiye Madrasah, Sivas, Turkey. Drum of the dome) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}(1217-8AD, 613-4AH)

Photo?

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