The German National Library and Albatros

The German National Library collects, records and archives what has been published or disseminated in Germany in print and digital form and abroad about Germany and what has been published or disseminated in the German language since 1913. This includes all music editions and music resources published in Germany. It has a stock of around 40 million media units and offers these and its services in the reading rooms in Leipzig and Frankfurt am Main and, as far as legally possible, in digital form via the World Wide Web.

Read the full articel (only available in German): 
https://www.fabasoft.com/de/news/aktuelles/die-deutsche-nationalbibliothek-und-albatros