The Exceptional Shield of Aat Messengergil is a 1099 years old piece made by Aat Messengergil, a mercenary living in Isfahan.
Considering its age and the quality of the work, people consider it of considerable value.
It is engraved with central asian patterns and some symbols pertaining to Mithraism.
This piece doesn't exist, but as a legend. It is said that in the year 906, Aat Messengergil, the owner, made use of it in Isfahan to empower the Messengergil family. Now it is lost, or broken, we will never know.