The Niels Bohr Archive (NBA) is an independent institution overseen by the University of Copenhagen with its own board of directors. Located at the Niels Bohr Institute, it holds extensive archival material documenting the life and work of Niels Bohr, the institute that he established and the tradition that he created.

NBA produces its own research and publications, and makes its archival collections available to researchers worldwide. It has also developed an outreach function. Over the years it has established itself as a central institution for documenting the history of modern physics and its social and philosophical implications. It is currently working to expand its archival and research activities.

[updated 15 November 2021] To mitigate the spread of the coronavirus, the Niels Bohr Archive follows all measures and restrictions in place at the University of Copenhagen. Public tours are suspended until further notice. Scholarly visits to the Archive are possible again after prior arrangement and explicit confirmation by email. To visit, you need documentation of completed vaccination or of a negative Covid test that is no older than 72 hours (quick test) or 96 hours (PCR test). Online user services remain fully functional. To contact the Niels Bohr Archive, please send a message to