Historical Archives of the European Union
(Note: You must register to use the digital collections.)The HAEU preserves and makes accessible for research the archives deposited by EU institutions according to the thirty-year rule governing access to archival material. It also collects and preserves private papers of individuals, movements and international organizations involved in European integration. Finally, it facilitates research on the history of the European Union, promotes public interest in European integration and enhances transparency in the functioning of EU Institutions [description from the website].