Religious orders and congregations

The Assumptionists of Europe: biographies and various documents (https://www.assomption.org/) 

The Assumptionists of North American Province: biographies, history... (https://assumption.us/aa-about-us/assumptionist-virtual-library/)

Institutum Historicum Augustinianum. Alphabetum Augustinianum (http://iha.augustinians.net/)

History of the Order of St Augustine (http://www.cassiciaco.it/navigazione/monachesimo/historia.html) 

Biographia Benedictina. Dictionary of Benedictine Biography online (http://www.benediktinerlexikon.de/wiki/Hauptseite) 

Diccionari biogràfic d’autors carmelites descalços de Catalunya (https://mcem.iec.cat/entrada.asp?epigraf_m=8)

Cartusiana: lots of information about the Carthusian monks (http://www.cartusiana.org/)

History of the Carthusian monasteries (https://chartreux.org/domus/)

Association for the Radiation of Cistercian Culture (https://www.arccis.org/)

Biographia Cisterciensis (www.zisterzienserlexikon.de) 

Cistopedia - Encyclopædia Cisterciensis (http://www.cistopedia.org/)

Collegiate churches and monasteries in medieval France (https://colemon.huma-num.fr/)

Dictionnaire biographique des frères prêcheurs français (19e-20e s.) (https://journals.openedition.org/dominicains/)

Franciscan Archive (https://franciscan-archive.org/index2.html)

Franciscan Authors (https://applejack.science.ru.nl/franciscanauthors/) 

Glossary of Monastic Terms (https://www.monasticwales.org/glossary.php)

Jesuit Archives. Central United States (http://jesuitarchives.org/) 

Jesuit online Library (https://jesuitonlinelibrary.bc.edu/)

Jesuit online necrology (https://jesuitonlinenecrology.bc.edu/) 

Digital Indipetae Database. Jesuit Petitions for Missions (https://indipetae.bc.edu/) 

Jesuit Studies Digital Collection (https://jsdc.bc.edu/)

Klöster und Stifte des Alten Reiches und angrenzender Gebiete (https://klosterdatenbank.adw-goe.de/liste)

Minimospedia (articles on the Order of Minims) (http://www.estudiosminimos.eu) 

Institut de recherche France-Asie, archives of Missions Étrangères de Paris (https://irfa.paris/) 

Monastic Matrix: nuns in Europe between 400 and 1600 (https://arts.st-andrews.ac.uk/monasticmatrix/search)

Monasticon belge (http://commissionroyalehistoire.be/pdf/monasticon_belge/)

Archives and Library of the Missionaries of Africa (White Fathers) (https://archivio.mafrome.org) 

Oblates of Mary Immaculate: historical dictionaries (https://www.omiworld.org/our-charism/history/historical-dictionary/)

Orden Online (www.orden-online.de) 

History of military orders (https://templiers.org) 

Wikipia, the piarist encyclopaedia in spanish (http://wiki.scolopi.net/w/index.php?title=Portada) 

Redemptorist biographies (https://www.santalfonsoedintorni.it/biografie-di-redentoristi) 

Redemptorist dictionaries https://www.santalfonsoedintorni.it/dizionari-redentoristi) 

Spiritan missionaries: digital archives & biographies (https://www.archives-spiritains.org/)

History of the Order of the Temple and the Crusades (www.templiers.net)