👉 In Catholicism, an "archdiocese" is a religious jurisdiction or diocese. It is a local church organization in which one bishop presides over a particular region of the Church. Archdioceses are typically located within a country or territory with a significant Christian presence. The term has been used to refer to different types of ecclesiastical structures, such as the Diocese of Rome and the Diocese of Canterbury. In Catholicism, the diocese is an administrative division that