Short biography on Constant in Dutch
Documentation
Pages
Citaten.net
Quotes of the artist in Dutch
Cobra museum voor moderne kunst
Information on Cobra in Dutch and English.
Constant (Nieuwenhuys) Amsterdam 1920 – 2005 Utrecht
Short history on Constant and Cobra with comments of Jan Elburg.
Digitale bibliotheek voor de Nederlandse letteren
Texts by and on Constant
Esther Schreuder
Curator/art historian/researcher's blog on the Cobra group in Dutch
Galeries.nl
Short biography on Constant in Dutch
Gemeentemuseum
The New Babylon project, part of the museum's masterpieces with some links to secondary materials in Dutch.
Het geheugen van Nederland
Database website of more than 800.000 images from 133 collections of 100 art organizations in the Netherlands.
Historie in perspectief
Item on graphic New Babylon work that was donated to the town of Meppel in 1967 which was eventually lost.