Tunis: Prime Minister's room, Dar el-Bey

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 22.5°.
• Contains 6 squares.
• Contains 12 regular two-pointed star polygons with vertex angle of 45°.
• Contains 9 regular 8-pointed star polygons with vertex angle of 90°.
• Contains one regular 16-pointed star polygon with vertex angle of 45°.
• There are 14 non-regular reflective tiles (including 2 kites and one dart) and two reflective pairs.
• The tiling satisfies the two-colour condition with straight cross-overs, but interlace counts not determined.
• The tiling is edge-to-edge.
• As drawn, contains about 1811 polygons.

1. Plate 60 (Prime Minister's room, Dar el-Bey, Tunis, Tunisia) of J Collin. Étude pratique de la décoration polygonale arabe, Paris, 1911. ISBN . [collin] {}

• Wade photo EPC 060
• Wade photo EPC 074

v54