More information is available in German language:
Hannah Arendt-Zentrum 

The Hannah Arendt Centre at the Carl von Ossietzky University was established on 1st of July in 1999.

The central focus is an archive that contains most of the archived remains of Hannah Arendt, it includes the complete "Hannah Arendt Papers" from the Library of Congress in Washington DC. The legacy consists of Hannah Arendt`s extensive correspondence ranging from notes, lecture manuscripts, diaries, and the various printed versions of her works. The inventory is continuously being complemented. With the current digital presentation of the Hannah Arendt Papers the Library of Congress is able to make the entire digitized collection available, remotely under the conditions outlined in the Rights and Access statement.

The Hannah Arendt Centre offers lectures, symposia and conferences on the work of Hannah Arendt and the intellectual history of the 20th century.

The archive is open to the academic and general public by appointment, an advance registration is requested.