To be able to preserve the works of art according to the guidelines stated by the Cultural Heritage Agency Fondation Constant has given the collection as long-term loans to several museums in the Netherlands.

In case of damage or maintenance the foundation uses the following companies to handle the art works:

Works on paper
Lingbeek papierrestauratie, Haarlem

Schilderijen restauratie en conservering Marjan de Visser, The Hague

Lydia Beerkens
Specialised in Modern Art restoration (e.g. outdoor polyester sculpture, plastics and immaterial elements as light, sounds and movement).

Janine van Reekum metaalrestauratie,

Fondation Constant is a not for profit organisation and your donations are always welcome and ever necessary: