The Austrian National Library, is the largest library in Austria, with 7.4 million items in its collections. It is located in the Hofburg Palace in Vienna; since 2005 some of the collections are located in the baroque Palais Mollard-Clary. Founded by the Habsburgs, the library was originally located in the current Prunksaal building and called the Hofbibliothek, changing to its current name after 1920.

• Telefoon +(0)1 534 10
• E-mail onb@onb.ac.at
• Adress Josefsplatz 1, 1010 Wien - Hofburg
• Website http://www.onb.ac.at