Calvert, Ornament in the Alhambra

• 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.
• The tiling satisfies the interlace condition and has one finite interlace and one infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 265 polygons.

• Figure in frontespiece (No colour) of A. F. Calvert. The Alhambra, London : G. Philip, Pressmark 18.C.52, 1904. [calvert2] {586 pages}

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