The Mundaneum archive centre contains some 6 kilometres of documents. Apart from the personal documents of the founders of the Mundaneum, Paul Otlet and Henri La Fontaine, and the collections of newspapers, posters, postcards, glass plates and small documents that they or their successors gathered, the Mundaneum preserves archives relative to three main themes: pacifism, anarchism and feminism.

Click here for an overview of the collections.