Deutsche Digitale Bibliothek (DDB)—online research resource for German materials

"The goal of the Deutsche Digitale Bibliothek (DDB) is to offer everyone unrestricted access to Germany’s cultural and scientific heritage, that is, access to millions of books, archived items, images, sculptures, pieces of music and other sound documents, as well as films and scores, from all over Germany. As a central, national portal, the DDB is aiming to bring together and network digital content from all of Germany’s cultural and scientific institutions." —https://www.deutsche-digitale-bibliothek.de/content/ueber-uns?lang=en