Mirzo Ulugbek (1409-1449), AmirTemur’s (1370-1405) grandson, started exlensive construction works in Samarkand, Bukhara, Shahrisabz and Gijduvan. Ulugbek Madrassah in Samarkand was constructed during three years (1417—1420) on the west side of the Registan square. It was one of classic education institutions of the East Inside there is a court yard with 54 cells (hujras), where 110 students lived. The architect of the building was Kavamiddin Shirazi, who served in the court of Shahruh, Ulugbek’s father. The scale of this madrassah can compete with the largest of Amir Temur’s constructions.