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| | The Episcopal Diocese of Northern Philippines - - Besao |
 | | The Diocese of Northern Philippines then had twelve provinces under its jurisdiction: Abra, Aurora, Batanes, Cagayan, Ifugao, Ilocos Norte, Ilocos Sur, Isabela, Kalinga-Apayao, Mountain Province, Nueva Viscaya and Quirino Province. |
 | | The jurisdiction of the continuing Diocese of Northern Philippines at present includes the municipalities of Barlig, Bauko, Besao, Bontoc, Sabangan, Sadanga, Sagada and Tadian in Mountain Province; Quirino, Cervantes, Salcedo, Del Pilar and San Emilio in Ilocos Sur; Tubo Municipality in Abra, and Tinglayan Municipality in Kalinga. |
 | | The Diocese of Northern Philippines was divided again in 2000 reducing further its area coverage with the formation of its eastern portion into the new Episcopal Diocese of Santiago. |
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