Great Mosque, Tlemcen

• The symmetry group of the tiling is *632 (p6m).
• All the internal angles of the constituent polygons are a multiple of 15°.
• Contains one regular 6-pointed star polygon with vertex angle of 60°.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are three non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has two finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 152 polygons.

1. Plate 327 (Great Mosque, Tlemcen, Algeria. Original is interlaced without colour, window decoration) from [humbert] (12th century AD)
2. Page 151 (From manuscript) from [necipoglu] (1206AD, 602AH)
3. Page 241, Fig. 105e (Cast metal door in the Book on the Knowledge of Ingenious Mechanical Devices by Ismail ibn al-Razzaz al-Jazari) from [bonner] (1206AD, 602AH)
4. Fig A.1 from [ww]

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