Badische Landesbibliothek

The Baden State Library (Badische Landesbibliothek, BLB) is a large universal library in Karlsruhe, Germany. Together with the Württembergische Landesbibliothek, the BLB is the legal deposit and regional library for Baden-Württemberg. It was established around 1500 and holds around 2.5 million media items.

More information on the German Wikipedia page

The website, in German, is.