In the middle of the 17th century the cathedral mosque of Bibi-Khanym lied in ruins and Samarkand needed a new mosque. Yalangtush-biy ordered to con­struct it on Registan. The mosque was expected to serve as a madrasah too. It was under construction for almost twenty years and was finished in 1660. The gild­ing mass on the dome, walls and mihrab was more then on every famous buildings in Central Asia. Owing to that, the madras­ah was called Tillya-Kari that means "gilt". The dome of the mosque remained unfin­ished till the 20th century. At the same time the lost facing was restored.