Dioceses of the Church of the East to 1318 to represent them. None of these four dioceses is mentioned again, and it is not clear when they lapsed. By the end of the 5th century there were at least three East Syriac dioceses in the Sassanian province of Media in western Iran. Canon XXI of the synod of Isaac in 410 foreshadowed the extension of the metropolitan principle to the bishops of Beth Madaye and other relatively remote regions. Hamadan (ancient Ecbatana) was the chief city of Media, and the Syriac name Beth Madaye (Media) was regularly used to refer to the East Syriac diocese of Hamadan as well
Ecbatana A badly-damaged stone lion sculpture is of disputed date: it may be Achaemenid or Parthian. Numerous Parthian-era constructions attest to Ecbatana's status as a summer capital for the Parthian rulers. In 2006, excavations in a limited area of Hagmatana hill failed to discover anything older than the Parthian period, but this does not rule out older archaeological layers existing elsewhere within the 35-hectare site. Ecbatana was first excavated in 1913 by Charles Fossey. Excavations have been limited due to the modern town covering most of the ancient site. In 1969 the Ministry of Culture and Art began buying property on