Alhambra, Sala de la Barca

The graphic is based on the upper corners of the marble facings round the niches (taqas) in the arch jambs of the south entrance to the Sala de la Barca, from the Patio de los Arrayanes.

• 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 squares.
• Contains two regular 8-pointed star polygons with vertex angle of 90°.
• There are five non-regular reflective tiles (including one kite).
• 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 328 polygons.

1. Figure in frontespiece (No colour) of A. F. Calvert. The Alhambra, London : G. Philip, Pressmark 18.C.52, 1904. [calvert2] {586 pages} Available on Internet.
2. Photo by David Wade: SPA 1622x (Alhambra, Sala de la Barca, Spain) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo SPA 1622x

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