Ten years later after completion of the Sher-Dor madrasah, Yalangtush Bahadur launched a new construction of a combination of a madrasah and juma-mosque, which was subsequently named Tillya-Kari (1646-1660). This building completed the composite design of the Registan.
From the very beginning the Ulugbek madrasah was the main religious institution of Samarkand, its unique university in the Middle Ages. Originally the madrasah had 50 hujras (cells), which served as a dwelling for more than one hundred students.