Catholic hierarchy

Archivio Apostolico Vaticano (http://www.archiviosegretovaticano.va/content/archiviosegretovaticano/it.html)

Official Acts of the Holy See  (ASS, AAS, 2e GM) ( www.vatican.va/archive/atti-ufficiali-santa-sede/index_fr.htm)

Enciclopedia dei papi (www.treccani.it/enciclopedia/elenco-opere/Enciclopedia_dei_Papi)

Annales Historiae Conciliorum, the journal, the glossary, the bibliography (http://www.konziliengeschichte.org)

Cardinals of the Holy Roman Church (cardinals.fiu.edu)

Catholic Hierarchy (www.catholic-hierarchy.org) 

Giga-Catholic Information (www.gcatholic.org)

Base d'Information Bibliographique en Patristique (https://www4.bibl.ulaval.ca/bd/bibp/)

Catholic Hierarchy in China since 1307 (http://www.bishops-in-china.com/)

Migration of Faith. Clerical Exile in Late Antiquity (https://blog.clericalexile.org/) 

The Catholic Encyclopedia: (http://www.newadvent.org/cathen/)

Catholic News Archives (https://thecatholicnewsarchive.org/) 

Crédic. Centre de Recherches et d'Échanges sur la Diffusion et l'Inculturation du Christianisme (www.credic.org)

History of missiology (School of Theology de l'univ. de Boston) (http://www.bu.edu/missiology/)

ODIS: 19th- and 20th- century intermediary structures in Flanders (www.odis.be)

Dictionary of African Christian Biography ( https://dacb.org/ ) 

Biographical Dictionary of Chinese Christianity (www.bdcconline.net/en/)

China Historical Christian Database (https://chcdatabase.com/)

Perú católico (https://perucatolico.com/)