The Digital Library of the University Library of Bonn offers users access to a growing amount of digitised sources from its collections. The digital library currently consists of four main sections:

• Goussen library collection: the Goussen Library is specialised in oriental Church History and contains books and manuscripts from the 16th to the 20th century in mostly Syrian, Coptic, Ethiopian, Arabic, Armenian and Georgian.
• Rheinische Landeskunde: sources regarding the history of what is now the German State of North Rhine-Westphalia consisting of two main parts: a series of legal documents of the Holy Roman Empire (the so-called "Scotti") and a collection of charters ("Ukunden").
• Historical Prints: digitised versions of copyright free prints from the 15th to the early 20th century.
• Sources and Literature regarding the History of the University of Bonn.