linguistic:voice_change, quality:corruption
German National Library

Frankfurt is one of two sites of the German National Library (Deutsche Nationalbibliothek), the other being Leipzig. The Deutsche Nationalbibliothek is a universal library in Germany. Its task, unique in Germany, is to collect, permanently archive, comprehensively document and record bibliographically all German and German-language publications from 1913 on, foreign publications about Germany, translations of German works and the works of German-speaking emigrants published abroad between 1933 and 1945, and to make them available to the public.