A Mudejar ceiling in the Real Alcazar

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 7.5°.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• Contains one regular 12-pointed star polygon with vertex angle of 60°.
• There are 6 non-regular reflective tiles (including one kite).
• 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 235 polygons.

1. Internet photo, Flickr (Alcazar, Seville, Spain. A Mudejar ceiling) of Not specific. Personal Communication, Information sent to the author, 21c. [pc]
2. Photo by David Wade: MOR 2635x (Sakkala, Tetouan, Morocco) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}
3. Plate 37 (Islamic: Motifs from Algerian public architecture, 13th and 14th centries) of Auguste Racinet. Full-Color Picture Sourcebook of Historic Ornament, Dover, 1886. ISBN 048626096. [racinet]

• Wade photo MOR 2635x

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