The Mau­soleum of Kho­ja Ahmed Yasawi, in the town of Yasi, now Turkestan, was built at the time of Timur (Tamer­lane), from 1389 to 1405. In this part­ly unfin­ished build­ing, Per­sian mas­ter builders exper­i­ment­ed with archi­tec­tur­al and struc­tur­al solu­tions lat­er used in the con­struc­tion of Samarkand, the cap­i­tal of the Timurid Empire. Today, it is one of the largest and best-pre­served con­struc­tions of the Timurid peri­od.