Searching for articles about the nomination of Zeist (NL),
Reading the article about Zeist you provided the link for I noted the existence of the "Moravian Heritage Network". Looking it up I found further reference to the setting up as long ago as 2002 of this network of historical sites linked to the Moravian Heritage
Bethlehem, Pennsylvania, USA
Elim, Cape Province, South Africa
Gracehill, Northern Ireland
Zeist, the Netherlands
The initiative seemed to come from Denmark (The Moravians seem to have operated significantly out of Denmark for their missionary activity - I remember being quite surprised to find out their importance in the bringing of Christianity to Greenland in the 18th C when i was there a few years ago)
This was said back in 2002"During the course of a number of years it is the intention to get all the cities entered on UNESCO´s World Heritage List. This does not involve in itself, preservation or protection of the cities but it means that the understanding of their value is enhanced."
A good many more years to go I suspect, if ever - but, nevertheless, an interesting concept - Protestantism and its missions are not well represented on the List compared with Catholicism.