The Diocese of Ploaghe (Latin: Dioecesis Plovacensis) was a Roman Catholic diocese located in the town of Ploaghe in the Province of Sassari in the Italian region Sardinia. Estalished in the 12th century, it was a suffragan (subordinate) of the metropolitan of Torres (Sassari). In 1503, the diocese was suppressed, by order of Pope Julius II.
Ploaghe is mentioned as a suffragan of Torres in the Liber Censuum of the late 12th century. [1]
The cathedral in Ploaghe was dedicated to Saint Peter. It was served and administered by a Chapter, composed of an Archpriest and seven canons. [2]
Inside the territory of the former diocese of Ploaghe, there were two monasteries of note. Holy Trinity of Saccargia was in existence before 1112. On 12 December of that year, Archbishop Azzo of Torres issued a privilege for the monastery, which was subscribed by Bishop Petrus of Ploghe. [3] The coenobium of S. Michele de Salvenero was already in existence by 1139 (the centenery of the foundation of the Vallombrosian Benedictines), when Pope Innocent II confirmed the possessions and privileges of S. Michele de Plano and S Michele de Salvenero. [4]
On 8 December 1503, after extensive consultations had taken place between King Ferdinand of Aragon and Sardinia, Isabella I of Castile, and Pope Alexander VI, and after discussions with members of the College of Cardinals (including Cardinal Giuliano della Rovere) and other interested parties, [5] and after additional consultations by Pope Julius II, the diocese of Ploaghe was suppressed, and its territory united to the archdiocese of Torres (Sassari). [6]