. The archeparchy was established in 1853 in the city of
Sanandaj (Sehna, Sinna),
Iran for the Iranian Christians in and around
Senaya, on territory split off from the Metropolitan
Chaldean Catholic Archdiocese of Kirkuk (in
Iraqi Kurdistan). In 1944, the archdiocese moved its headquarters to
Tehran, the capital of
Iran. On 3 January 1966, it lost territory to establish the non-Metropolitan
Chaldean Catholic Archeparchy of Ahvaz, also in Iran. The Assyrian community of Sanandaj gradually migrated to Tehran from 1960 to 1968, lived in the same district of Agha Zaman (now Namak), and frequently visits Sanandaj as their birthplace. There are still some Assyrian houses from the early 1900s intact and in use today. It enjoyed a papal visit from
Pope Paul VI in November 1970. On 16 March 1971, the Chaldean Catholic Archdiocese of Sehna was renamed the Archdiocese of Tehran. == Metropolitan Archeparchs (archbishops) ==