Acta Sanctorum
Analecta hymnica
L'Année Philologique
Cambridge Ancient History
New Cambridge Medieval History
Database of Latin Dictionaries
Digital Loeb Classical Library
Dyabola: Census of Antique Art
International Medieval Bibliography
Lexikon des Mittelalters
Library of Latin Texts (CLCLT)
Mirabile
Monumenta Germaniae Historica
New Jacoby Online
New Pauly Online
Oxford Bibliographies Online
Oxford Classical Dictionary
Oxford Dictionary of Byzantium
Oxford Dictionary of the Christian Church
Patrologia Graeca
Patrologia Latina
Perseus: Greek and Roman Materials
Thesaurus Linguae Graecae
Thesaurus Linguae Latinae
TOCS-IN
Vetus Latina Database
How can I quickly find information on an historical figure, event, etc.?
Consult some of the standard print and electronic encyclopedias. For Classics, begin with the following: Cambridge Ancient History, Oxford Classical Dictionary, and the New Pauly Onine. For Medieval Studies, see Strayer's Dictionary of the Middle Ages, the Oxford Dictionary of the Middle Ages, Lexikon des Mittelalters, and the New Cambridge Medieval History.