Study and research are supported by the university library network, the operation of which is coordinated by the renowned University Library Founded in 1561 by the Jesuit order, it is the oldest library in the country, which was opened to the public in 1876.

Until 1949 the Library specialized in the history of religion, theology, philosophy and the universal history of the Middle Ages and the Modern Age. The historical collection - including 185 codices, 1150 incunabula and 2600 old Hungarian printed books published before 1711, 7000 volumes from the 16th century, and the oldest manuscript, an 8th century Beda fragment - is part of the Hungarian cultural heritage

The Library's database contains 230 000 item records, 175 000 bibliographic records, and 225 000 authority records. There is also a direct link to the online catalogues of the Central Library of the Miskolc University and the Central Library of Semmelweis University.

Besides the traditional library services, the Library provides access to e-text archives, online copies of printed documents, electronic-only materials and CD-ROMs. The Library is one of the members of the "Hungarian Online Librarian", an online reference service of librarians.