Ashmolean museum, wooden door panels

Doors: Pair of doors with geometric insets, Egypt about 1270-1320. Wood, with carved ivory and ebony insets. The presence of crosses on five of the ivory plaques suggest that these doors belonged to a Christian building, possibly a Coptic church.

• The symmetry group of the tiling is *2222 (pmm).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains two regular octagons.
• Contains one regular 8-pointed star polygon with vertex angle of 45°.
• There are four non-regular reflective tiles.
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 593 polygons.

1. Ashmolean Museum web site (No location, Egypt) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

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