The Historic Door of Farid Ku-enlilacox is a 4210 years old piece made by Farid Ku-enlilacox, a builder living in Isfahan.
Considering its age and the quality of the work, people consider it of priceless value.
It is engraved with central asian patterns and some symbols pertaining to Ancient Mesopotamian religion.
This piece doesn't exist, but as a legend. It is said that in the year -2069, Dariush Ku-enlilacox, the owner, made use of it in Isfahan to empower the Ku-enlilacox family. Now it is lost, or broken, we will never know.