archives and collections

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• NETHERLANDS ARCHITECTURE INSTITUTE

• Archief Har Oudejans
  The Har Oudejans Archive is housed at the Nederlands Architectuur Instituut (NAi), Rotterdam.

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• NETHERLANDS INSTITUTE FOR ART HISTORY

• Archief Constant
  The Constant/New Babylon Archive is housed at the Rijksbureau voor kunsthistorische documentatie, [Netherlands Institute for Art History, The Hague]. Search the RKDartist database. The New Babylon project was entrusted to the Gemeentemuseum The Hague.

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• STEDELIJK MUSEUM SCHIEDAM

• Archief Goos Verweij
  The Goos Verweij Archief houses letters of Constant.

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• Besides the archival materials and documentation in public repositories most of the information is still in private hands. This survey is based on the list in Marcel Hummelink, Après nous la liberté : Constant en de artistieke avant-garde in de jaren 1946-1960 (Amsterdam 2003) 349.
  1. Noël Arnaud : Letters
  2. Graham Birtwistle : Letters to Martin Visser
  3. Aldo and Hannie van Eyck : Documentation
  4. Stephen Gilbert : Letters
  5. Ina Oudejans-Kok : Documents related to the Situationist International
  6. Nic. Tummers : Documents
  7. Steef de Vries : Letters
  8. Bram Wisman : Photographs and documents
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