Chester Beatty Library Koran

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 15°.
• Contains one regular three-pointed star polygon with vertex angle of 90°.
• Contains one regular four-pointed star polygon with vertex angle of 120°.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• There are four non-regular reflective tiles (including one kite).
• 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 449 polygons.

1. Page 408, Fig. 335b (Great Mosque, Siirt, Turkey. Minaret) from [bonner] (1129AD, 522AH)
2. 14th century Egypt (No location, Egypt. Chester Beatty Library, Dublin) from [pc]
3. 899:1-1884 (Cairo, Egypt. Panel from a wall cupboard) from [vami]
4. Fig 7.1a, 11.3a photo from [ww]
5. Internet photo 282 (Location uncertain, al-naski qaisun minbar, Egypt. Woodwork details 14thc) from [d-avennes]
6. Internet photo Thesaurus Islamicus Foundation: (al-Azhar mosque, Cairo, Egypt. Ottoman riwaqs of prayer hall, kursi) from [pc]

• V&A record Panel from a wall cupboard

• Tiling with three or more proper stars
• Tilings from copies of a Koran

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