• The Web Site of The Holy See.
• The Holy See Press Office.
• L'Osservatore Romano.
• Radio Vatican News.
• Vatican Television Centre (Centro Televisivo Vaticano)
• The College of Cardinals.
• Official Vatican Dicastery Statements.
• Papal Encyclicals and Other Official Papal Writings.
• Papal Encyclicals and Other Official Papal Writings Online.
• Popes in the 20th Century.  
• Portale di Propaganda Fide
• Catholic Hierarchy
• Agenzia Fides
• Catholic.net
• Christus Rex

BISHOPS' CONFERENCES

NATIONAL BISHOPS CONFERENCES

• United States National Conference of Catholic Bishops.
• Canadian Conference of Catholic Bishops.
• Australian Catholic Bishops Conference.
• New Zealand Conference of Catholic Bishops.  
• Consilium Conferentiarum Episcoporum Europae (CCEE).
• English and Welsh Conference of Catholic Bishops.
• Bishops' Conference of Scotland.
• Conférence des Evêques de France.
• Conférence des Evêques de Belgique.
• Bischofkonferenz Deutschlands.
• Die Österreichische Bischofskonferenz.
• Schweizer Bischofskonferenz.
• Conferencia Episcopal Española.
• Conferenza Episcopale Italiana.
• Konferencia biskupov Slovenska.
• Magyar Katolikus Püspöki Konferencia.
• Conferentia Epicopalis Scandiae.
• Katolske Kirke i Norge.
• Federation of Asian Bishops' Conferences (FABC).
• Korea Catholic Bishops Conference.
• Philippines Catholic Bishops' Conference.
• Consejo Episcopal Latinoamericano (CELAM).
• Conferencia Episcopal Venezolana.
• Conferencia Episcopal de Chile.
• Conferência Nacional dos Bispos do Brasil.
• Symposium of the Episcopal Conferences of Africa and Madagascar (SEFCAM).