Roman mosaic

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 30°.
• Contains one regular two-pointed star polygon with vertex angle of 60°.
• Contains one regular hexagon.
• Contains one regular four-pointed star polygon with vertex angle of 30°.
• Contains one regular 12-gon.
• There are two non-regular reflective tiles (including one kite).
• The tiling satisfies the two-colour condition.
• The tiling is edge-to-edge.
• As drawn, contains about 646 polygons.

1. Page 13, photo 4 (Roman mosaic, El Djem, Tunisia. 3rd century) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}

• Regular polygons with more than eight sides

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