Alcazar, Seville

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains four squares.
• Contains one regular octagon.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are three non-regular reflective tiles.
• The tiling satisfies the interlace condition and has three finite interlaces and no infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 209 polygons.

1. Photo by David Wade: SPA 0527x (Alcazar, Seville, Spain) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo SPA 0527x

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