The world heritage site Takht-e Soleyman is situated approx. 600 km west of Tehran. Early settlements can be traced back to the fifth century B.C. In the sixth century A.D. the area was transformed into a representative fire sanctuary under Sasanian rule. Large parts of this sanctuary have been re-used when the site was turned into a hunting palace for the Ilkhanid Abaqa Khan in the late 13th century a.C. The site was abandoned in the subsequent centuries and most of the elaborate architecture fell derelict. A part of the largest structure, the probably throne hall, called “Western Eivan” has survived until today. It has been supported provisionally by a scaffolding since the 1970s in order to prevent further deterioration. After a 3D Scan, a study on its architectural features and a limited archaeological sondage digging, first approaches for a retrofitting of the ruin were outlined.