Coptic Cross

• 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 hexagon.
• There are three non-regular reflective tiles.
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 213 polygons.

1. E.3841:3-1938 (Cairo, Egypt. Sketchbook by James Wild) from [vami]
2. Internet photo (Coptic church of Saint Barbara, Cairo, Egypt) from [pc]
3. Photo from Internet (Hanging Church, Cairo, Egypt. Entrance, top) from [pc]
4. Photo from V and A (Coptic church of Saint Barbara, Cairo, Egypt. Coptic Cross) from [wild]

• V&A record sketchbook...

v54