| 344 |
Diocese of Tongeren was established (from Diocese of Köln) |
| 380 |
Diocese of Tongeren was renamed as Diocese of Tongeren en Maastricht |
| 450 |
Diocese of Tournai was established (from Metropolitan Archdiocese of Reims and became suffragan of Reims) |
| 530 |
Diocese of Tongeren en Maastricht was suppressed (to establish Diocese of Maastricht) |
| 720 |
Diocese of Liège was established (from the suppressed Diocese of Maastricht) |
| 1559.05.12 |
Diocese of Antwerpen was established (from Diocese of Cambrai and Diocese of Liège and became suffragan of Mechelen) |
| 1559.05.12 |
Diocese of Brugge was established (from Diocese of Tournai and became suffragan of Mechelen) |
| 1559.05.12 |
Diocese of Gent was established (from Diocese of Cambrai, Diocese of Tournai and Diocese of Utrecht and became suffragan of Mechelen) |
| 1559.05.12 |
Diocese of Ieper was established (from Diocese of Tournai, gained territory from Diocese of Thérouanne and became suffragan of Mechelen) |
| 1559.05.12 |
Metropolitan Archdiocese of Mechelen was established (from Diocese of Cambrai and Diocese of Liège and with suffragan sees Antwerpen, Brugge, Gent, Ieper and ’s-Hertogenbosch) |
| 1559.05.12 |
Diocese of Namur was established (from Diocese of Cambrai and Diocese of Liège and became suffragan of Cambrai) |
| 1801.07.15 |
Diocese of Antwerpen was suppressed (to Metropolitan Archdiocese of Mechelen and Apostolic Vicariate of ’s-Hertogenbosch) |
| 1801.07.15 |
Metropolitan Archdiocese of Mechelen lost territory to Diocese of Gent |
| 1801.07.15 |
Diocese of Namur lost territory to Metropolitan Archdiocese of Mechelen |
| 1801.07.15 |
Diocese of Tournai lost territory to Diocese of Gent |
| 1801.11.29 |
Diocese of Brugge was suppressed (to Diocese of Gent) |
| 1801.11.29 |
Diocese of Ieper was suppressed (to Diocese of Cambrai and Diocese of Gent) |
| 1801.11.29 |
Diocese of Tournai lost territory to Diocese of Arras |
| 1802.04.18 |
Diocese of Liège lost territory to Metropolitan Archdiocese of Mechelen and Diocese of Namur |
| 1821.07.16 |
Diocese of Liège exchanged territory with Metropolitan Archdiocese of Köln |
| 1830 |
Diocese of Tournai exchanged territory with Diocese of Cambrai |
| 1832.12.17 |
Apostolic Administration of West-Vlaanderen was restored (from Diocese of Gent) |
| 1834.05.27 |
Apostolic Administration of West-Vlaanderen was promoted as Diocese of Brugge (became suffragan of Mechelen) |
| 1841.03.04 |
Diocese of Gent lost territory to Apostolic Vicariate of Breda |
| 1842.05.18 |
Diocese of Liège exchanged territory with Diocese of Namur |
| 1842.05.18 |
Diocese of Namur exchanged territory with Diocese of Liège |
| 1853.03.04 |
Diocese of Liège lost territory to Diocese of Roermond |
| 1853.03.04 |
Metropolitan Archdiocese of Mechelen lost territory to Diocese of ’s-Hertogenbosch and Apostolic Vicariate of Breda |
| 1919 |
Apostolic Administration of Eupen–Malmedy–Sankt Vith was established (from Metropolitan Archdiocese of Köln) |
| 1921.07.30 |
Apostolic Administration of Eupen–Malmedy–Sankt Vith was promoted as Diocese of Eupen–Malmedy (became suffragan of Mechelen) |
| 1925.04.15 |
Diocese of Eupen–Malmedy was suppressed (to Diocese of Liège) |
| 1957.09.07 |
Military Vicariate of Belgium was established |
| 1960.07.22 |
Apostolic Exarchate of France (Ukrainian Rite) was established |
| 1961.12.09 |
Diocese of Antwerpen was restored (from Metropolitan Archdiocese of Mechelen and became suffragan of Mechelen–Brussel) |
| 1961.12.09 |
Metropolitan Archdiocese of Mechelen was renamed as Metropolitan Archdiocese of Mechelen–Brussel (lost territory to establish Diocese of Antwerpen, lost suffragan see Gent and gained suffragan sees Antwerpen and Gent) |
| 1965.08.31 |
Ordinariate of Ordinariaat voor buitenlandse studenten in België was established |
| 1967.05.31 |
Diocese of Brugge lost territory to Diocese of Tournai |
| 1967.05.31 |
Diocese of Gent exchanged territory with Diocese of Tournai |
| 1967.05.31 |
Diocese of Hasselt was established (from Diocese of Liège and became suffragan of Mechelen–Brussel) |
| 1967.05.31 |
Diocese of Liège lost territory to Metropolitan Archdiocese of Mechelen–Brussel |
| 1967.05.31 |
Diocese of Tournai lost territory to Metropolitan Archdiocese of Mechelen–Brussel |
| 1969.04.16 |
Titular Episcopal See of Ieper was restored |
| 1969.05.30 |
Titular Episcopal See of Tongeren was restored |
| 1980.10.15 |
Ordinariate of Ordinariaat voor buitenlandse studenten in België was suppressed |
| 1986.07.21 |
Military Vicariate of Belgium was promoted as Military Ordinariate of Bisdom bij de Krijgsmacht |
| 2013.01.19 |
Apostolic Exarchate of France (Ukrainian Rite) was promoted as Diocese of Saint-Vladimir-le-Grand de Paris (without ecclesiastical province) |
