Many libraries have already digitized rare books, maps, historical and current scientific journals and publication series. Here is an overview of the most important websites.
A consortium of natural history and botanical libraries that make their collections available Open Access:
An association of libraries worldwide, which offer their digitized collections. Due to copyright restrictions some material is not available in Germany:
Europeana is a virtual library which makes available the scientific and cultural heritage of Europe in the form of images, text, audio and video files to a wide public:
Digitized collection of the Staats- und Universitätsbibliothek Hamburg:
Munich Digitization Center: