The Second Vatican Council (1962–1965), in order to ensure that all Catholics received proper spiritual attention, decreed the reorganization of the diocesan structure of Italy and the consolidation of small and struggling dioceses.

On 18 February 1984, the Vatican and the Italian State signed a new and revised concordat.

Based on the revisions, a set of Normae was issued on 15 November 1984, which was accompanied in the next year, on 3 June 1985, by enabling legislation.

According to the agreement, the practice of having one bishop govern two separate dioceses at the same time, aeque personaliter, was abolished.

There was to be only one diocesan Tribunal, in Mileto, and likewise one seminary, one College of Consultors, and one Priests' Council.

[13] Erected: 11th Century Latin Name: Miletensis Immediately Subject to the Holy See 30 September 1986: United with the suppressed Diocese of Nicotera e Tropea Roman Catholic Diocese of Tropea This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.