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Changes in Ecclesiastical Circumscriptionsin United Kingdom | ![]() |
| Date | Change |
| 402 | Diocese of Whithorn was established |
| 445 | Diocese of Armagh was established |
| 454 | Diocese of Clogher was established |
| 477 | Diocese of Sodor was established |
| 500 | Diocese of Kilmore was established |
| 514 | Diocese of Dromore was established |
| 546 | Diocese of Bangor was established |
| 550 | Diocese of Glasgow was established |
| 560 | Diocese of Llandaff was established |
| 573 | Diocese of Saint Asaph was established |
| 597 | Diocese of Canterbury was established |
| 600 | Diocese of Down was established |
| 600 | Diocese of Saint David’s was established |
| 600 | Diocese of Whithorn was suppressed |
| 600 | Diocese of York was established |
| 601 | Diocese of Canterbury was promoted as Metropolitan Archdiocese of Canterbury |
| 604 | Diocese of London was established |
| 604 | Diocese of Rochester was established (from Metropolitan Archdiocese of Canterbury) |
| 630 | Diocese of Dunwich was established |
| 634 | Diocese of Dorchester was established |
| 635 | Diocese of Lindisfarne was established |
| 656 | Diocese of Mercia was established (from Diocese of York) |
| 660 | Diocese of Dorchester was suppressed (to establish Diocese of Winchester) |
| 660 | Diocese of Winchester was established (from the suppressed Diocese of Dorchester) |
| 669 | Diocese of Mercia was renamed as Diocese of Lichfield |
| 670 | Diocese of Leicester was restored |
| 673 | Diocese of Elmham was established (from Diocese of Dunwich) |
| 676 | Diocese of Hereford was established |
| 678 | Diocese of Hexham was established (from Diocese of York) |
| 680 | Diocese of Worcester was established |
| 681 | Diocese of Selsey was established |
| 700 | Diocese of Glasgow was suppressed |
| 705 | Diocese of Sherborne was established (from Diocese of Leicester) |
| 735 | Diocese of York was promoted as Metropolitan Archdiocese of York |
| 750 | Diocese of Ross was established |
| 787 | Diocese of Lichfield was promoted as Metropolitan Archdiocese of Lichfield |
| 800 | Diocese of Abernathy was established |
| 803 | Metropolitan Archdiocese of Lichfield was demoted as Diocese of Lichfield |
| 820 | Diocese of Hexham was suppressed |
| 850 | Diocese of Saint Andrews was established |
| 870 | Diocese of Elmham was suppressed (to Diocese of Dunwich) |
| 875 | Diocese of Leicester was renamed as Diocese of Dorchester |
| 879 | Diocese of Lindisfarne was renamed as Diocese of Chester-le-Street |
| 909 | Diocese of Crediton was established (from Diocese of Sherborne) |
| 909 | Diocese of Ramsbury was established (from Diocese of Dorchester and Diocese of Sherborne) |
| 909 | Diocese of Wells was established |
| 931 | Diocese of Cornwall was established (from Diocese of Crediton) |
| 950 | Diocese of Elmham was restored |
| 971 | Diocese of Dorchester was renamed as Diocese of Dorchester |
| 995 | Diocese of Chester-le-Street was renamed as Diocese of Durham |
| 1040 | Diocese of Cornwall was suppressed (to Diocese of Crediton) |
| 1050 | Diocese of Abernathy was suppressed |
| 1050 | Diocese of Crediton was renamed as Diocese of Exeter |
| 1055 | Diocese of Birsay was established |
| 1058 | Diocese of Sherborne was suppressed |
| 1063 | Diocese of Mortlach was established |
| 1070 | Diocese of Dunwich was renamed as Diocese of Thetford |
| 1072 | Diocese of Dorchester was renamed as Diocese of Lincoln |
| 1075 | Diocese of Lichfield was renamed as Diocese of Chester |
| 1075 | Diocese of Chichester was established (from the suppressed Diocese of Selsey) |
| 1075 | Diocese of Elmham was suppressed |
| 1075 | Diocese of Ramsbury was suppressed (to establish Diocese of Sarum) |
| 1075 | Diocese of Sarum was established (from the suppressed Diocese of Ramsbury) |
| 1075 | Diocese of Selsey was suppressed (to establish Diocese of Chichester) |
| 1090 | Diocese of Wells was renamed as Diocese of Bath |
| 1094 | Diocese of Thetford was renamed as Diocese of Norwich |
| 1098 | Diocese of Sodor was renamed as Diocese of Sodor and Man (gained territory from the suppressed Diocese of Man) |
| 1100 | Diocese of Cinél nEógain was established |
| 1100 | Diocese of Moray was established |
| 1102 | Diocese of Chester was renamed as Diocese of Coventry |
| 1109 | Diocese of Ely was established (from Diocese of Lincoln) |
| 1114 | Diocese of Dunkeld was established |
| 1114 | Diocese of Glasgow was restored |
| 1125 | Diocese of Aberdeen was established (from the suppressed Diocese of Mortlach) |
| 1125 | Diocese of Mortlach was suppressed (to establish Diocese of Aberdeen) |
| 1128 | Diocese of Whithorn was restored |
| 1133 | Diocese of Carlisle was established |
| 1137 | Diocese of Birsay was renamed as Diocese of Kirkwall |
| 1146 | Diocese of Caithness was established |
| 1150 | Diocese of Brechin was established |
| 1152 | Diocese of Armagh was promoted as Metropolitan Archdiocese of Armagh |
| 1155 | Diocese of Strathearn was established |
| 1183 | Diocese of Argyll was established (from Diocese of Dunkeld) |
| 1197 | Diocese of Bath was renamed as Diocese of Bath and Glastonbury |
| 1219 | Diocese of Bath and Glastonbury was renamed as Diocese of Bath |
| 1219 | Diocese of Sarum was renamed as Diocese of Salisbury |
| 1239 | Diocese of Coventry was renamed as Diocese of Coventry and Lichfield |
| 1245.01.03 | Diocese of Bath was renamed as Diocese of Bath and Wells |
| 1254 | Diocese of Cinél nEógain was renamed as Diocese of Derry |
| 1387 | Diocese of Sodor and Man was renamed as Diocese of Sodor (lost territory to establish Diocese of Man) |
| 1388 | Diocese of Argyll was renamed as Diocese of Argyll and the Isles |
| 1420 | Diocese of Argyll and the Isles was renamed as Diocese of Argyll |
| 1442 | Diocese of Down was renamed as Diocese of Down and Connor |
| 1472.08.17 | Diocese of Saint Andrews was promoted as Metropolitan Archdiocese of Saint Andrews |
| 1492.01.09 | Diocese of Glasgow was promoted as Metropolitan Archdiocese of Glasgow |
| 1530 | Diocese of Llandaff was suppressed |
| 1535 | Diocese of Hereford was suppressed |
| 1539 | Diocese of Coventry and Lichfield was suppressed |
| 1542 | Diocese of Bristol was established (from Diocese of Bath and Wells) |
| 1547 | Diocese of Dunkeld was suppressed |
| 1550 | Diocese of Caithness was suppressed |
| 1550 | Diocese of Ross was suppressed |
| 1557 | Diocese of Salisbury was suppressed |
| 1558 | Diocese of Bangor was suppressed |
| 1558 | Diocese of Bristol was suppressed |
| 1558 | Metropolitan Archdiocese of Canterbury was suppressed |
| 1558 | Diocese of Durham was suppressed |
| 1558 | Diocese of Ely was suppressed |
| 1558 | Diocese of Kirkwall was suppressed |
| 1558 | Diocese of Norwich was suppressed |
| 1558 | Diocese of Rochester was suppressed |
| 1558 | Diocese of Saint David’s was suppressed |
| 1558 | Diocese of Sodor was suppressed |
| 1558 | Diocese of Whithorn was suppressed |
| 1559 | Diocese of Chichester was suppressed |
| 1560 | Diocese of Argyll was suppressed |
| 1560 | Diocese of Carlisle was suppressed |
| 1560 | Diocese of Exeter was suppressed |
| 1560 | Diocese of Winchester was suppressed |
| 1565 | Diocese of Worcester was suppressed |
| 1569 | Diocese of Bath and Wells was suppressed |
| 1569 | Diocese of London was suppressed |
| 1570 | Diocese of Strathearn was suppressed |
| 1571 | Metropolitan Archdiocese of Saint Andrews was suppressed |
| 1577 | Diocese of Aberdeen was suppressed |
| 1579 | Metropolitan Archdiocese of York was suppressed |
| 1584 | Diocese of Lincoln was suppressed |
| 1585 | Diocese of Saint Asaph was suppressed |
| 1603 | Metropolitan Archdiocese of Glasgow was suppressed |
| 1622 | Apostolic Vicariate of England was restored |
| 1638 | Diocese of Brechin was suppressed |
| 1638 | Diocese of Moray was suppressed |
| 1653.10.13 | Apostolic Prefecture of Scotland was restored |
| 1688.01.30 | Apostolic Vicariate of England was renamed as Apostolic Vicariate of London District (lost territory to establish Apostolic Vicariate of Midland District and Apostolic Vicariate of Northern District) |
| 1688.01.30 | Apostolic Vicariate of Midland District was established (from Apostolic Vicariate of England) |
| 1688.01.30 | Apostolic Vicariate of Northern District was restored (from Apostolic Vicariate of England) |
| 1688.01.30 | Apostolic Vicariate of Western District was established |
| 1694.03.16 | Apostolic Prefecture of Scotland was promoted as Apostolic Vicariate of Scotland |
| 1727.07.23 | Apostolic Vicariate of Highland District of Scotland was restored (from Apostolic Vicariate of Scotland) |
| 1727.07.23 | Apostolic Vicariate of Scotland was renamed as Apostolic Vicariate of Lowland District of Scotland (lost territory to establish Apostolic Vicariate of Highland District of Scotland) |
| 1827.02.13 | Apostolic Vicariate of Lowland District of Scotland was renamed as Apostolic Vicariate of Eastern District of Scotland (lost territory to establish Apostolic Vicariate of Western District of Scotland) |
| 1827.02.13 | Apostolic Vicariate of Highland District of Scotland was renamed as Apostolic Vicariate of Northern District of Scotland |
| 1827.02.13 | Apostolic Vicariate of Western District of Scotland was restored (from Apostolic Vicariate of Lowland District of Scotland) |
| 1840 | Diocese of Eastern District was established (from Apostolic Vicariate of Midland District) |
| 1840 | Apostolic Vicariate of Lancashire District was established (from Apostolic Vicariate of Northern District) |
| 1840 | Apostolic Vicariate of Wales District was established (from Apostolic Vicariate of Western District) |
| 1840.05.11 | Apostolic Vicariate of Yorkshire District was established (from Apostolic Vicariate of Northern District) |
| 1840.07.03 | Apostolic Vicariate of Midland District was renamed as Apostolic Vicariate of Central District |
| 1850.09.29 | Apostolic Vicariate of Yorkshire District was promoted as Diocese of Beverley |
| 1850.09.29 | Apostolic Vicariate of Central District was promoted as Diocese of Birmingham (lost territory to establish Diocese of Nottingham and Diocese of Shrewsbury) |
| 1850.09.29 | Apostolic Vicariate of Western District was promoted as Diocese of Clifton (lost territory to establish Diocese of Plymouth) |
| 1850.09.29 | Apostolic Vicariate of Northern District was promoted as Diocese of Hexham |
| 1850.09.29 | Apostolic Vicariate of Lancashire District was promoted as Diocese of Liverpool (lost territory to establish Diocese of Salford and Diocese of Shrewsbury) |
| 1850.09.29 | Apostolic Vicariate of Wales District was promoted as Diocese of Newport and Menevia (lost territory to establish Diocese of Shrewsbury) |
| 1850.09.29 | Diocese of Eastern District was renamed as Diocese of Northampton |
| 1850.09.29 | Diocese of Nottingham was established (from Apostolic Vicariate of Central District) |
| 1850.09.29 | Diocese of Plymouth was established (from Apostolic Vicariate of Western District) |
| 1850.09.29 | Diocese of Salford was established (from Apostolic Vicariate of Lancashire District) |
| 1850.09.29 | Diocese of Shrewsbury was established (from Apostolic Vicariate of Central District, Apostolic Vicariate of Lancashire District and Apostolic Vicariate of Wales District) |
| 1850.09.29 | Diocese of Southwark was established (from Apostolic Vicariate of London District) |
| 1850.09.29 | Apostolic Vicariate of London District was promoted as Metropolitan Archdiocese of Westminster (lost territory to establish Diocese of Southwark) |
| 1861.05.23 | Diocese of Hexham was renamed as Diocese of Hexham and Newcastle |
| 1878.03.04 | Apostolic Vicariate of Northern District of Scotland was promoted as Diocese of Aberdeen |
| 1878.03.04 | Diocese of Dunkeld was restored |
| 1878.03.04 | Diocese of Galloway was restored (from Apostolic Vicariate of Western District of Scotland) |
| 1878.03.04 | Apostolic Vicariate of Western District of Scotland was promoted as Archdiocese of Glasgow (lost territory to establish Diocese of Galloway) |
| 1878.03.05 | Diocese of Argyll and the Isles was restored |
| 1878.03.15 | Apostolic Vicariate of Eastern District of Scotland was promoted as Metropolitan Archdiocese of Saint Andrews and Edinburgh |
| 1878.12.20 | Diocese of Beverley was suppressed (to establish Diocese of Leeds and Diocese of Middlesbrough) |
| 1878.12.20 | Diocese of Leeds was established (from the suppressed Diocese of Beverley) |
| 1878.12.20 | Diocese of Middlesbrough was established (from the suppressed Diocese of Beverley) |
| 1882.05.19 | Diocese of Portsmouth was established (from Diocese of Southwark) |
| 1895 | Diocese of Newport and Menevia was renamed as Diocese of Newport (lost territory to establish Apostolic Vicariate of Wales) |
| 1895 | Apostolic Vicariate of Wales was restored (from Diocese of Shrewsbury and Diocese of Newport and Menevia) |
| 1898.05.12 | Apostolic Vicariate of Wales was promoted as Diocese of Menevia |
| 1911.10.28 | Diocese of Birmingham was promoted as Metropolitan Archdiocese of Birmingham |
| 1911.10.28 | Diocese of Liverpool was promoted as Metropolitan Archdiocese of Liverpool |
| 1916.02.07 | Metropolitan Archdiocese of Cardiff was restored (from the suppressed Diocese of Newport) |
| 1916.02.07 | Diocese of Newport was suppressed (to establish Metropolitan Archdiocese of Cardiff) |
| 1917.07.20 | Diocese of Brentwood was established (from Metropolitan Archdiocese of Westminster) |
| 1924.11.22 | Diocese of Lancaster was established (from Metropolitan Archdiocese of Liverpool) |
| 1947.05.25 | Archdiocese of Glasgow was promoted as Metropolitan Archdiocese of Glasgow (lost territory to establish Diocese of Motherwell and Diocese of Paisley) |
| 1947.05.25 | Diocese of Motherwell was established (from Archdiocese of Glasgow and Diocese of Galloway) |
| 1947.05.25 | Diocese of Paisley was established (from Archdiocese of Glasgow) |
| 1953.11.21 | Military Vicariate of Great Britain was established |
| 1957.06.10 | Apostolic Exarchate of England and Wales (Ukrainian Rite) was established |
| 1965.05.28 | Diocese of Arundel and Brighton was established (from Diocese of Southwark) |
| 1965.05.28 | Diocese of Southwark was promoted as Metropolitan Archdiocese of Southwark (lost territory to establish Diocese of Arundel and Brighton) |
| 1967.03.08 | Apostolic Exarchate of England and Wales (Ukrainian Rite) was renamed as Apostolic Exarchate of Great Britain |
| 1969 | Titular Episcopal See of Beverley was restored |
| 1969 | Titular Episcopal See of Elmham was restored |
| 1969 | Titular Episcopal See of Newport was restored |
| 1969 | Titular Episcopal See of Ramsbury was restored |
| 1969 | Titular Episcopal See of Selsey was restored |
| 1973 | Titular Episcopal See of Abernethy was restored |
| 1973 | Titular Episcopal See of Mortlach was restored |
| 1973 | Titular Episcopal See of Rosemarkie was restored |
| 1973 | Titular Episcopal See of Strathearn was restored |
| 1976.03.13 | Diocese of East Anglia was restored (from Diocese of Northampton) |
| 1980.05.30 | Diocese of Hallam was established (from Diocese of Leeds and Diocese of Nottingham) |
| 1986.07.21 | Military Vicariate of Great Britain was promoted as Military Ordinariate of Catholic Bishopric of the Forces in Great Britain |
| 1987.02.12 | Diocese of Wrexham was established (from Diocese of Menevia) |
| 2011.01.15 | Personal Ordinariate of Our Lady of Walsingham (Anglican Rite) was established |
| 2013.01.18 | Apostolic Exarchate of Great Britain (Ukrainian Rite) was promoted as Diocese of Holy Family of London |
as of 2015.04.25
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