In the digital collections, you can take a look at the digitized prints from the holdings of the ULB Düsseldorf free of cost. In special collections, the ULB unites rare, valuable and unique parts of holdings that are installed as an ensemble. Deposita, unpublished works, donations, acquisition of rare books etc. were and are an important source for the constant growth of the library. These treasures and specialties - beyond their academic value - also contribute substantially to the profile of the ULB.