The Österreichische Nationalbibliothek - Austrian national library,

With 7.4 million items in its collections, the largest library in Austria. It is located in the Hofburg Palace in Vienna. It was founded by the Habsburgs and was originally called the Hofbibliothek, changing to its current name after 1918.

The collections consist of: papyri, manuscripts, ancient and rare books, maps, globes, music, portraits, graphics, photographs, autographs and posters as well as works in and on Esperanto and other artificial languages are stored in the various collections and are available for scientific research. (Source: Wikipedia)

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