Roman Catholic Diocese of Nusco

Diocese of Nusco was a Roman Catholic ecclesiastical territory in Campania, southern Italy, existing until 1986. In that year it was united into the archdiocese of Conza-Sant'Angelo dei Lombardi-Bisaccia, to form the Archdiocese of Conza-Sant'Angelo dei Lombardi-Nusco-Bisaccia. It was a suffragan of the archdiocese of Salerno.

Nusco is in the province of Avellino. The diocese dates from the eleventh century. Among its bishops were

In 1820 the diocese of Montemartino was united to Nusco. St. John, a Benedictine (1084) was the first Bishop of Montemartino; forty of his successors are known.

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