At the time of Ulugbeg, the two-dome mausoleum added the lower group of Shahi- Zinda, to the left of the famous staircase. The building, with traces of numerous repairs and additions, has been much damaged - a portal and corner premises of ziaratkhana have lost. The written source "Samaria" does not mention the mausoleum. Probably, the author, Abu-Takhir Khodja did not find any historical inscriptions and dates on the monument. It is said that this is a tomb of foster-mother of Amir Temur, Uldja-Inaga and her daughter Bibi-Sineb, what was fixed in many sources of the 19th century. In the mid-20th century, the scholars did assumption that the mausoleum was built by Ulugbeg above the tomb of astronomer Qazi-zadeh Rumi, participating in establishment of the Samarkand observatory. However, archeological survey of the crypt has revealed a deposition of some rather young woman, denying the last version. The deposition was done under the floor in a ground grave. The small gurkhana with two domes on well-balanced drums is located above the grave. The portal accents the front entrance. Sets of enameled bricks, forming geometrical and epigraphic motifs, prevail in exterior dЁ¦cor. Some places are decorated with composed mosaic. The interior still keeps some remains of paintings in dark blue palette on a white background.