Collection of German Prints
The Collection of German Prints () or SDD is the virtual German national library. Founded in 1989 by an association of six German libraries it covers the entire German-language literature. Each library is responsible for a specified period of time:

 1450–1600: Bavarian State Library (Munich)
 1601–1700: Herzog August Library (Wolfenbüttel)
 1701–1800: Göttingen State and University Library
 1801–1870: Frankfurt University Library
 1871–1912: Berlin State Library
 since 1913: German National Library

See also 
 German National Library#Working Group for the Collection of German Imprints (AG SDD)

External links 
 Arbeitsgemeinschaft Sammlung Deutscher Drucke (archive)

German digital libraries
German-language literature
National libraries
1989 establishments in Germany
Libraries established in 1989