Nicolaas Posthumus, a socialist and first chair appointment in economic history in the Netherlands,[1] founded the International Institute of Social History in 1935.[4] To examine how labour relations develop over time, IISG collected archives from all over the world. During the first years Posthumus succeeded in obtaining many papers from anarchists (Bakunin manuscripts), other socialist and social democratic and Marxist movements from Germany and Russia.
Before the Germans invaded the Netherlands in 1940, Posthumus was able to move the most valuable archives to London. During the war, many remaining IISG archives were transported to Nazi Germany. They were not destroyed. Most of the papers were rediscovered in Hannover in 1946, and some other parts were later found in archives in Moscow in 1991, and returned to Amsterdam.[5]
In 1989 the International Institute of Social History moved to new premises: an old warehouse at the Cruquiusweg in the eastern part of Amsterdam. This building also housed the Press Museum but in 2017 that museum became a part of the Dutch Institute for Image and Sound (Nederlands Instituut voor Beeld en Geluid) in Hilversum.[6]
^Bergvelt, Ellinoor; Knegtmans, Peter Jan; Schilder, Marian (2007). "Nicolaal Wilhelmus Posthumus (1880-1960)". Colourful professors: 375 years of portraiture in the collection of the Universiteit van Amsterdam. Amsterdam UP. pp. 120–21. ISBN9789056294496.