San Crisogono, Rome

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains one square.
• There are three non-regular reflective tiles.
• The tiling satisfies the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 319 polygons.

1. Figure 3-21d (San Crisogono, Rome, Italy. Oblique grid pattern) of Paloma Pajares-Ayuela. Cosmatesque ornament: flat polychrome geometric patterns..., Thames and Hudson, 2002. ISBN 050051075. [pajares] {London}

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