Trinità e Beata Vergine Maria Madre della Chiesa, dedicated to the Holy Trinity and, in a late-20th century addition, to Mary Mother of the Church, is located in Cerreto Sannita.

In 1612, since Telese was almost completely depopulated, Bishop Gian Francesco Leoni transferred the episcopal residence to Cerrito (which came to be called Cerreto vecchio).

[3] That Cerreto was completely destroyed in the great earthquake of 5 June 1688, with a death toll at around 4,000 in the city and county.

[5] Bishop de Belli reported that the cathedral and the episcopal palace of Cerreto vecchio were destroyed, that the cathedral Chapter lost eight of its members, the collegiate church of S. Martino lost its archpriest and two canons, and the larger part of the priests were killed.

[16] On 27 June 1818, Pius VII issued the bull De Ulteriore, in which the ecclesiastical province of Benevento was restored, including it suffragans, among them the united dioceses of Cerreto e Telese.

[20] On 6 July 1852, in the bull "Compertum Nobis", Pope Pius IX made the decision to reverse the judgment of Pope Pius VII and restore the independence of the diocese of Alife, thereby separating its territory again from the power of the bishop of Cerreto e Telese.

[21] Following the Second Vatican Council, and in accordance with the norms laid out in the council's decree, Christus Dominus chapter 40,[22] Pope Paul VI ordered a reorganization of the ecclesiastical provinces in southern Italy, beginning with consultations among the members of the Congregation of Bishops in the Vatican Curia, the Italian Bishops Conference, and the various dioceses concerned.

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.