Changes in Ecclesiastical Jurisdictions in Iran

Date	Change
1300	Diocese of Diargorgan was established
1318.04.01	Metropolitan Archdiocese of Soltania was established
1400	Diocese of Diargorgan was suppressed
1450	Metropolitan Archdiocese of Soltania was suppressed
1553	Archdiocese of Urmyā (Chaldean Rite) was established
1629.10.12	Diocese of Isfahan was established (without ecclesiastical province)
1662	Archdiocese of Urmyā (Chaldean Rite) was suppressed
1709	Diocese of Salmas (Chaldean Rite) was established
1850.04.30	Diocese of Ispahan (Armenian Rite) was established (became suffragan of Cilicia)
1853	Metropolitan Archdiocese of Sehna (Chaldean Rite) was established (from Metropolitan Archdiocese of Kirkuk)
1890.09.04	Metropolitan Archdiocese of Urmyā (Chaldean Rite) was restored (with suffragan see Salmas)
1910.09.11	Diocese of Isfahan was promoted as Archdiocese of Isfahan
1926	Titular Episcopal See of Soltania was suppressed
1966.01.03	Archdiocese of Ahvaz (Chaldean Rite) was established (from Metropolitan Archdiocese of Sehna and without ecclesiastical province)
1970	Titular Metropolitan See of Rew-Ardashir (Chaldean Rite) was established
1971.03.16	Metropolitan Archdiocese of Sehna (Chaldean Rite) was renamed as Metropolitan Archdiocese of Tehran
2021.01.08	Archdiocese of Isfahan was renamed as Archdiocese of Tehran–Isfahan