The
Austrian National Library (, abbreviated
ÖNB) is the largest library in
Austria, with 7.4 million items in its various collections. The library is located in the
Hofburg Palace in
Vienna. Since 2005, some of the collections have been relocated within the
baroque structure of the
Palais Mollard-Clary. Founded by the
Habsburgs, the library was originally called the
Hof-Bibliothek ("Imperial Library"); the change to the current name occurred in 1920. The library complex includes four museums, as well as multiple special collections and archives.