The shrine of Zayn al-Mulk was built by Ja'far ibn 'Imad ibn 'Ali al-Adhami al-Gulbari al-Hasani in 1480-1AD (Golombek, Lisa and Wilbur, Donald: The Timurid Architecture of Iran and Turan, Princeton, 1988, vol.I, pp.386-387). Built during the period of Aqquyunlu control of the city, it retains a Timurid aesthetic in its design and colouring. Another virtually identical tile mosaic panel is in the Sackler Gallery, Washington, D.C., (Lentz, Thomas W., and Glenn D. Lowry: Timur and the Princely Vision, Persian Art and Culture in the Fifteenth Century, Los Angeles, 1989, pp.257 and 358). They were purchased by Sackler and Heidi Vollmoeller from successive lots in the sale of property from Hagop Kevorkian. Further smaller panels also survive in Western Collections, worked with less imposing designs but in the same colour scheme.