The Grotesque Lute of Iman Artengo is a 4502 years old piece made by Iman Artengo, a musician 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 Folk religion.
This piece doesn't exist, but as a legend. It is said that in the year -1853, Yusuf Artengo, the owner, made use of it in Isfahan to empower the Artengo family. Now it is lost, or broken, we will never know.