In 380 it was renamed as Diocese of Tongeren and Maastricht, acknowledging a secondary see (in the present Netherlands).
In 530 it was formally suppressed, its territory being used to establish the Diocese of Maastricht, which in turn was suppressed in 720 to establish the Diocese of Liège, but would be nominally revived (separately) in 1971 as a Latin titular see of episcopal rank.
Titular see
The diocese was nominally restored on 1969.05.30 as a Latin titular see of episcopal rank, with an exception of archiepiscopal rank.
It has had the following incumbents, after a long initial vacancy :
Titular Archbishop Henri Lemaître (1969.05.30 – death 2003.04.20), Apostolic Delegate (papal diplomatic envoy) to Vietnam (1969.05.30 – 1975.12.19), then Apostolic Pro-Nuncio (papal ambassador) to Uganda (1975.12.19 – 1981.11.16), next Apostolic Pro-Nuncio to the Nordic countries Denmark and Finland and Iceland and Norway and Sweden (1985.10.31 – 1992.03.28), final Apostolic Nuncio (papal ambassador) to the Netherlands (1992.03.28 – emeritate 1997.02.08)