Consisting of a portal with twin circular minarets, and a domed chamber containing the gravestone of a woman named Bakht-i Aga (also called Gunbad-i Dukhtar-i Amir Khusraw Shah), this ensemble originally connected with a larger structure, no longer standing. The two extant elements appear to date from the same period, but the chamber may represent renovation and reconstruction work undertaken on a pre-existing structure at the time of the portal's construction. The gravestone itself is older, perhaps by two centuries.
The ornamentation is characteristic of the mid fourteenth century. A revetment is constructed from glazed bricks and faience; light and dark blue with some white and areas of glaze removed to reveal the biscuit, form kufic script and large geometric patterns.
Sources:
Donald N. Wilber.
The Architecture of Islamic Iran. New York: Greenwood Press, 1969.
