Cathedral Monreale

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two squares.
• Contains two regular 8-pointed star polygons with vertex angle of 90°.
• There is one non-regular reflective tile.
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 121 polygons.

• Cathedral, Monreale (Marble paving, 1859-1870) of anon. Islamic culture in medieval Sicily, Vienna, 2004. ISBN 187404440. [siculo] {327 pages}

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