This square dome chamber shares many construction and decorative features with the nearby Friday mosque of Ashtarjan, including polychrome plaster and a small-sized mud brick used in the mosque's dome chamber. Construction of the two structures possibly commenced concurrently; inscriptions indicate that the shrine was completed seven years before the mosque, perhaps due to the extensive decorative program of the latter.
The interior walls, lined with a coat of white plaster, are articulated with eight shallow recesses filled with an applied plaster floral motif, capped by an area of painted details within the arch head.
A noteworthy stucco mihrab was removed from the tomb shrine to the Tehran Archeological Museum during a recent period of restoration work.
Source:
Donald N. Wilber, The Architecture of Islamic Iran, (New York: Greenwood Press, 1969).