The visit of Samarkand started with the three Medresas, the Koranic schools where the scientific matters are also thought, on Registan (English: Sand) Square. The oldest one, the Medresa of Ulugh Beg, one important scientist of the Timur dynasty, was built in the 14-15th Century. A big effort was made by the soviets to restore the buildings and work still is in progress. The sandy underground had trouble to sustain the massive buildings, which started to tilt over, like the tower in Pisa. A...