Ulugh Beg madrasah in Registan Square

• The symmetry group of the tiling is 4*2 (p4g).
• All the internal angles of the constituent polygons are a multiple of 45°.
• There are three non-regular reflective tiles (including one kite).
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 73 polygons.

1. Fig 62 (Ulugh Beg madrasah, Samarkand, Central Asia. No colour in the original) 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}(1420-40AD, 823-43AH)
2. Photo by David Wade: TRA 0408 (Shir Dar madrasah, Samarkand, Central Asia) of David Wade. Website: patterninislamicart.com, UK, 2015. [wadei] {Website}(1636AD, 1045AH)

• Wade photo TRA 0408

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