Universitäts- und Landesbibliothek Sachsen-Anhalt

Acronym ULB.

Established in 1699 in Halle (Saale), Germany as a university library. With over 5.55 million items it is today the largest library in Sachsen-Anhalt. It was founded in 1696.

More information on the German Wikipedia page.

The website, in German, is.