Changes in Ecclesiastical Jurisdictions in Romania

Date	Change
300	Archdiocese of Constantia antea Tomi was established
600	Archdiocese of Constantia antea Tomi was suppressed
1009	Diocese of Byhor was established
1009	Diocese of Transilvania was established
1077	Diocese of Byhor was renamed as Diocese of Oradea Mare
1227	Diocese of Milcovia was established (from Metropolitan Archdiocese of Esztergom)
1371	Diocese of Siret was established (without ecclesiastical province)
1381	Diocese of Argeș was established (became suffragan of Kalocsa)
1418	Diocese of Baia was established
1418	Diocese of Moldovita was established
1434	Diocese of Siret was suppressed (to Diocese of Baia)
1453	Diocese of Milcovia was renamed as Diocese of Milcovia
1520	Diocese of Argeș was suppressed
1525	Diocese of Baia was suppressed
1542	Diocese of Milcovia was suppressed (to Metropolitan Archdiocese of Esztergom)
1550	Diocese of Moldovita was suppressed
1590	Diocese of Bacău was established (from former Diocese of Argeș)
1648	Apostolic Vicariate of Valachie was established
1697.03.27	Diocese of Alba Iulia (Romanian Rite) was established (from Diocese of Transilvania)
1721.05.18	Diocese of Alba Iulia (Romanian Rite) was renamed as Diocese of Făgăraş
1777.06.23	Diocese of Oradea Mare (Romanian Rite) was established (from Diocese of Oradea Mare)
1804.08.09	Diocese of Satu Mare was established (from Diocese of Eger and became suffragan of Eger)
1818	Diocese of Bacău was suppressed (to establish Apostolic Vicariate of Moldavia)
1818	Apostolic Vicariate of Moldavia was established (from the suppressed Diocese of Bacău)
1853.11.26	Diocese of Făgăraş (Romanian Rite) was promoted as Metropolitan Archdiocese of Făgăraş (with suffragan sees Lugoj and Oradea Mare and lost territory to establish Diocese of Lugoj)
1853.11.26	Diocese of Lugoj (Romanian Rite) was established (from Diocese of Făgăraş and Diocese of Oradea Mare and became suffragan of Făgăraş)
1853.12.19	Diocese of Gherla, Armenopoli, Szamos-Ujvár (Romanian Rite) was established (from Metropolitan Archdiocese of Făgăraş and became suffragan of Făgăraş)
1854.11.16	Metropolitan Archdiocese of Făgăraş (Romanian Rite) was promoted as Metropolitanate sui juris of Făgăraş şi Alba Iulia
1883.04.27	Apostolic Vicariate of Valachie was promoted as Archdiocese of Bucureşti
1884.06.27	Apostolic Vicariate of Moldavia was promoted as Diocese of Iaşi (without ecclesiastical province)
1890	Titular Archiepiscopal See of Constantia antea Tomi was restored
1922	Apostolic Administration of Targul-Siret (Ruthenian Rite) was established
1923.02.17	Apostolic Administration of Timişoara was established (from Diocese of Csanád)
1925	Titular Archiepiscopal See of Constantia antea Tomi was renamed as Titular Archiepiscopal See of Constantia
1926	Titular Archiepiscopal See of Constantia was demoted as Titular Episcopal See of Constantia
1929	Titular Episcopal See of Constantia was promoted as Titular Archiepiscopal See of Constantia
1930	Apostolic Administration of Targul-Siret (Ruthenian Rite) was suppressed
1930.06.05	Diocese of Gherla, Armenopoli, Szamos-Ujvár (Romanian Rite) was renamed as Diocese of Cluj–Gherla (lost territory to establish Diocese of Maramureş)
1930.06.05	Diocese of Maramureş (Romanian Rite) was established (from Metropolitanate sui juris of Făgăraş şi Alba Iulia, Diocese of Gherla, Armenopoli, Szamos-Ujvár, Diocese of Hajdúdorog, Diocese of Ivano-Frankivsk, Diocese of Mukacheve and Diocese of Oradea Mare and became suffragan of Făgăraş şi Alba Iulia)
1930.06.05	Ordinariate of Romania (Armenian Rite) was established
1930.06.05	Apostolic Administration of Timişoara was promoted as Diocese of Timişoara
1930.06.06	Archdiocese of Bucureşti was promoted as Metropolitan Archdiocese of Bucureşti (with suffragan sees Iaşi, Oradea Mare, Satu Mare, Timişoara and Transilvania)
1932.03.22	Diocese of Transilvania was renamed as Diocese of Alba Iulia
1933	Titular Archiepiscopal See of Constantia was renamed as Titular Archiepiscopal See of Tomi
1937.09.02	Diocese of Satu Mare lost territory to Metropolitan Archdiocese of Eger and Diocese of Košice
1982.08.05	Diocese of Oradea Mare lost territory to Diocese of Szeged–Csanád
1990	Titular Archiepiscopal See of Tomi was renamed as Titular Archiepiscopal See of Constantia in Scythia
1991.08.05	Diocese of Alba Iulia was promoted as Archdiocese of Alba Iulia (without ecclesiastical province)
2005.12.16	Metropolitanate sui juris of Făgăraş şi Alba Iulia (Romanian Rite) was promoted as Major Archdiocese of Făgăraş şi Alba Iulia
2014.05.29	Diocese of Sfântul Vasile cel Mare de Bucureşti (Romanian Rite) was established (from Major Archdiocese of Făgăraş şi Alba Iulia and became suffragan of Făgăraş şi Alba Iulia)