Ibrahim mosque, Salihin, Aleppo

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains one regular octagon.
• Contains one regular four-pointed star polygon with vertex angle of 45°.
• There are two non-regular reflective tiles.
• The tiling satisfies the interlace condition and has one finite interlace and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 167 polygons.

1. Page 266, Fig. 138a (Great Mosque, Birgi, Turkey. Mihrab) of Jay Bonner. Islamic Geometric Patterns, Springer, 2016. ISBN 978144190216. [bonner] {Largest Islamic tile collection in print}(1112AD, 505AH)
2. photo from Mirek Majewski (Great Mosque, Birgi, Turkey) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]

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