Zayn al-Din Yusuf, Cairo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 1.5°.
• Contains one regular octagon.
• Contains one regular 8-pointed star polygon with vertex angle of 111°.
• There are 6 non-regular reflective tiles (including 2 kites).
• The tiling satisfies the interlace condition and has three finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 363 polygons.

1. Thesaurus Islamicus (Zayn al-Din Yusuf, Cairo, Egypt. Blind window) of Not specific. Personal Communication, Information sent to the author, 21c. [pc] (1298AD, 697AH)

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