Samarkand, Ulugh Beg madrasah (1420)

• The symmetry group of the tiling is *442 (p4m).
• All the internal angles of the constituent polygons are a multiple of 7.5°.
• Contains one regular 8-pointed star polygon with vertex angle of 90°.
• Contains one regular 12-pointed star polygon with vertex angle of 90°.
• There are 9 non-regular reflective tiles.
• The tiling satisfies the interlace condition and has five finite interlaces and no infinite interlace.
• The tiling is edge-to-edge.
• As drawn, contains about 471 polygons.

• Slide 115 (Photo from Donald Bell, Central Asia) of Not specific. Personal Communication, Information sent to the author, 21 century . [pc]
• Figure 62, bottom left corner (Samarkand, Ulugh Beg madrasah (1420), Central Asia) of Derek Hill. Islamic architecture and its decoration, A.D. 800-1500..., Faber and Faber, Pressmark 35.C.183, 1964. ISBN 050051032. [hill] {With an introductory text by Oleg Grabar}

• Tiling with star polygons with 12 points whose vertex angle is 90°

v29