Roman Catholic Diocese of Acqui Tags: Clerical Administrative Region, Diocese.The Italian Catholic Diocese of Acqui (Latin: Dioecesis Aquensis) straddles the (civil) regions of Piedmont and Liguria. As a suffragan of the Archdiocese of Turin it falls within the ecclesiastical region of Piedmont. thumbnail area (km2) 1.683e+09 country Italy Established 4th century jurisdiction Diocese province Roman Catholic Archdiocese of Turin Learn more... Loading...