Brepols Publishers
L'Année philologique
Archive of celtic-latin Literature (ACLL)
Aristoteles Latinus Database (ALD)
Bibliographie de Civilisation Médiévale (BCM)
Bibliographie du Moyen Âge Tardif (BAMAT)
Bibliography of British and Irish History Online (BBIH) (ehemals: Royal Historical Society Bibliography)
Bibliothèque Bibliographique des littératures francophones européennes (Bi.B.Li.Fr.E.)
Bischöfe des Heiligen Römischen Reiches und der deutschsprachigen Länder (1198-2001) / Bishops of the Holy Roman Empire (BHRR)
Brepolis - Latin (Brepolis Latin Complete)
Brepolis - Medieval Online (Brepolis Medieval Encyclopaedias + Brepolis Medieval Bibliographies)
Brepols Periodica Online: Archive
BREPOLSOnline Books
Database of Latin Dictionaries (DLD) / Base de données dictionnairiques latine
Dictionary of Medieval Latin from British Sources (DMLBS)
Dictionnaire des philosophes antiques Online
Dictionnaire d'histoire et de géographie ecclésiastiques (DHGE)
Europa Sacra
In Principio: Incipit Index of Latin Texts
Index Religiosus - International Bibliography of Theology, Church History, and Religious Studies
International Bibliography of Humanism and the Renaissance (IBHR)
International Directory of Medievalists
International Encyclopaedia for the Middle Ages (IEMA)
International Medieval Bibliography (IMB)
Lexikon des Mittelalters (LexMA)
Library of Latin Texts - Series A (LLT-A)
Library of Latin Texts - Series B (LLT-B)
Monumenta Germaniae Historica (eMGH)
Patrologia Orientalis Database (POD)
Sources Chrétiennes Online (SCO)
Ut per Litteras Apostolicas - Papal Letters (LITPA)
Vetus Latina Database (VLD)