St Maria in Cosmedin, Rome

• 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.
• There is one non-regular reflective tile.
• The tiling satisfies the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 345 polygons.

1. Figure 1-41c (Pavement. San Pietro (Chisa della Canta), Trivoli) from [pajares]
2. Figure 2-172 (right) (Pavement in the left aisle of San Clemente) from [pajares]
3. Figure 4-120 (San Crisogono, Rome, Italy. Pavement) from [pajares]
4. Page 75 (middle left) (St Maria in Cosmedin, Rome, Italy. Mosaic floor, 6th-12th centuries) from [hessemer]

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