Zellij dado, Sa'di tombes, Marrakesh

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains two regular 8-pointed star polygons with vertex angle of 90°.
• Contains one regular 16-pointed star polygon with vertex angle of 45°.
• There are 8 non-regular reflective tiles (including 2 kites).
• 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 451 polygons.

1. Page 76 (Saadian Tombs, Marrakesh, Morocco. Zellij dado) from [degeorge2] (1603AD, 1011AH)
2. Photo by David Wade: MOR 1201 (Saadian Tombs, Marrakesh. Morocco) from [wadei] (1603AD, 1011AH)
3. Vol 1, page 407 (Mohammed V mausoleum, Rabat, Morocco) from [paccard]
4. Vol 2, page 285 (Royal Palace, Fez, Morocco. Detail of door) from [paccard]
5. Vol 2, page 288 (Royal Palace, Marrakesh, Morocco. Detail of door) from [paccard]
6. Vol 2, page 398 (Dar Beida, Marrakesh, Morocco. Ceiling panel) from [paccard]

• Wade photo MOR 1201

• Escher's Alhambra tiling pattern

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