Zellij dado, Sa'di tombes, Marrakech

• 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.
• The tiling satisfies the interlace condition and has no finite interlace and two infinite interlaces.
• The tiling is edge-to-edge.
• As drawn, contains about 397 polygons.

• Page 76 (Zellij dado, Sa'di tombes, Marrakech, 16th century, Morocco) from [degeorge]
• Vol 1, page 407 (Mohammad V mausoleum, Rabat, Morocco) from [paccard]
• Vol 2, page 285 (Detail of door, Royal Palace, Fez, Morocco) from [paccard]
• Vol 2, page 288 (Detail of door, Royal Palace, Marrakesh, Morocco) from [paccard]
• Vol 2, page 398 (Marrakesh, Dar Beida, ceiling panel, Morocco) from [paccard]

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• Wade photo MOR 1201

• Escher's Alhambra tiling pattern

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