Conza, a city of the province of Avellino, Southern Italy, was twice destroyed by earthquakes (980, 1694), and was at one time nearly abandoned.

In Conza half the town was destroyed, and, according to the "Chronicon Cassinense", the bishop was killed in the disaster.

[5] On 22 July 1051, Pope Leo IX, who was visiting the monastery of Montecassino, confirmed the rights, privileges, and possessions of the Church of Salerno.

On 20 July 1088, at the request of Roger Borsa, Duke of Apulia and Calabria, Pope Urban II again confirmed the rights and privileges of the archbishops of Salerno.

[9] The suffragan dioceses of the archdiocese of Conza, at the end of the 12th century, were: Muro Lucano, Satriano, Monteverde, Lacedonia, S. Angelo de' Lombardi, and Bisaccia.

On 25 September 1225, Pope Honorius III wrote him a particularly tart letter, announcing that he had taken action to fill episcopal posts which had long been vacant.

The bearer of the letter was the new archbishop of Salerno, whom the pope expected Frederick to receive courteously (exhibitorem praesentium vultu sereno recipiat).

[12] The previous archbishop of Conza had died in 1268, some time before the death of Pope Clement IV, on 29 November 1268.

The death of the pope brought on the longest vacancy in papal history, during which no legal rulings could be issued and no bishops appointed or approved.

Clement's successor, Pope Gregory X (Tedaldo Visconti), accepted the papal office in early February 1272, and reassigned the case to Cardinal Orsini.

The right of the king to nominate the candidate for a vacant bishopric was recognized, as in the Concordat of 1741, subject to papal confirmation (preconisation).

[17] On 27 June 1818, Pius VII issued the bull De Ulteriore, in which he reestablished the metropolitan archbishopric of Conza.

It was administered by a corporate body called the Chapter, composed of three dignities (the Archdeacon, the Cantor, and the Primicerius) and eight canons.

On 30 September 1986, by a decree of Pope John Paul II, the three dioceses were united into one entity, the archdiocese of Salerno-Campagna-Acerno.

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.