With more than 700.000 items, the BBF is today Europe's second largest library specialised in education. Like the Herzog-August-Bibliothek in Wolfenbüttel, it belongs to the association of German cultural research libraries fulfilling a national role.

This catalogue records information in e-journals, e-books, databases, and printed material about themes in the field of the international law. Especially, a large part of the print collection of the Peace Palace Library is searchable through this catalogue. This collection consists of books and materials since 1913.