A Pontifical and Lectionary of the Bishopric is kept in Saint Petersburg. This artifact testifies that Cattaro remained under the jurisdiction of the Western Church following the Great Schism of 1054. In 1025, Pope John XIX issued a papal bull in which Cattaro became a suffragan of the Diocese of Canusium (Canosa). In 1063, Pope Alexander II issued a papal bull in which Cattaro is also mentioned as a suffragan of the Archdiocese of Barium (Bari), previously known as the Diocese of Canusium. In 1067, the diocese became subjected to the Archdiocese of Dioclea-Antivari. Then, in 1078, the diocese became subjected to the Archdiocese of Ragusa (Dubrovnik), only to be returned under the control of Antivari in 1089. In 1120, the diocese of Cattaro was returned under the control of Dubrovnik. Between 1172 and 1828, the diocese was under the control of the Archdiocese of Barium. From 1828 to 1932, the diocese became a suffragan of the Archdiocese of Zadar. From 1932 to 1969, it became directly subjected to the Holy See. However, from 1969, the diocese of Cattaro has been a suffragan of the Archdiocese of Split-Makarska.