Alcazar, Seville

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

1. Photo by David Wade: SPA 2215 (Alcazar, Seville, Spain) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo SPA 2215

• Tiling whose tile angles are a multiple of 45° and whose lengths are p+q*sqrt(2).

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