CORTONA, DIOCESE OF. In Tuscany, in the province of Arezzo, immediately subject to the Holy See. The date of the foundation of the episcopal church of Cortona is not very ancient, since the city was included within the territory of the vast diocese of Arezzo until the 14th century. The civil and religious disputes of the comune of Cortona (Guelph) with the Aretine bishops (Ghibelline) led to a definitive separation: JOHN XXII
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