Diocese of Bobbio
The Italian Catholic diocese of Bobbio existed until 1986, having been created from Bobbio Abbey. In 1923 it was combined with the territorial Abbey of San Columbano, with official name diocese of Bobbio-San Colombano. As reorganised in 1986, it became part of the archdiocese of Genova-Bobbio. In a subsequent change, it was transferred, to the diocese of Piacenza-Bobbio, in 1989.
In the year 1014, the Emperor Henry II, on the occasion of his own coronation in Rome, obtained from Pope Benedict VIII the erection of Bobbio as a see. Peter Aldus, its first bishop, had been Abbot of Bobbio since 999, and his episcopal successors for a long time lived in the abbey, where many of them had been monks. According to Ferdinando Ughelli and others, Bobbio was made a suffragan see of Genoa in 1133; but Fedele Savio finds this subordination mentioned for the first time in a Bull of Pope Alexander III, dated 19 April 1161. From time to time disputes arose between the bishop and the monks, and in 1199 Pope Innocent III issued two Bulls, restoring the abbey in spirituals and temporals, and empowering the bishop to depose an abbot if within a certain time he did not obey.
Other bishops were:
- Blessed Albert (1184), who was translated to the Patriarchal See of Jerusalem and died a martyr at Acre in 1214;
- the canonist Giovanni de Mondani (1477–82);
- Saint Antonio Maria Gianelli (1838–46).