There is a so-called collection share between the ELTE libraries, whereby the libraries of the various faculties and the collection of the University Library and Archives together provide direct access to the specialized literature of the sciences taught and researched at the university.
With its almost 2 million documents, the University Library is the third largest one in the capital. Until 1949 its collection interest covered works from all disciplines taught at the university, later it was limited to   medieval and early modern times world history, religion and history of religion.  Since then the library has nation-wide responsibility for the collection of publications in these fields.  Furthermore the library collects and stores