Cappella Palatina, Palazzo dei Normanni, Palermo

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one regular 12-pointed star polygon with vertex angle of 90°.
• There are five non-regular reflective tiles.
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 267 polygons.

• Page 112 (top) (Mosaic decoration, Cappella Palatina, Palazzo dei Normanni, Palermo, 1132-40) of F M Hessemer. Historic Designs and Patterns in Color, Dover, about 1840. ISBN 048626425. [hessemer] {This collection is unusual in giving the source for almost all the patterns.}

• Tiling with star polygons with 12 points whose vertex angle is 90°

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