In 1990 the then Minister for Culture, Hedy d’Ancona, issued the Delta Plan for Cultural Preservation: a large-scale and national program to thoroughly improve collection storage conditions in Dutch museums. This signalled the start of a transformation of the Dutch museum.he reason for this radical transformation of Dutch museums was the pending privatization of the country’s national museums. From the beginning of the 1990s, national museums had to stand on their own feet. That gave the ...