Alhambra, Sala de la Barca

Ceramic mosaic covering the inside of the niches (taqas) in the arch jambs of the entrance into the Sala de la Barca from the Patio de los Arrayanes. Original colours shown.

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 45°.
• Contains two regular four-pointed star polygons with vertex angle of 45°.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• There are four non-regular reflective tiles (including one kite).
• The tiling satisfies the interlace condition and has no finite interlace and one infinite interlace with straight cross-overs.
• The tiling is edge-to-edge.
• As drawn, contains about 218 polygons.

1. Plate 153 (Alhambra, Sala de la Barca, Spain. Tin-glazed earthenware Mosaic) of Claud Humbert. Islamic Ornamental Design, Faber and Faber, 1980. ISBN 057111587. [humbert] {Useful, contains several tilings.}(16th century AD)
2. Photo by David Wade: SPA 0217 (Alhambra, Sala de la Barca, Spain) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}

• Wade photo SPA 0217

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

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