This is really out of my field and depth but a Dutch friend has sent me these photographs from a recent visit which I hope will be of interest. I have asked for more details.

Click image for larger version.  Name: Paul 1.JPG  Views: 35  Size: 415.1 KB  ID: 22135Click image for larger version.  Name: Paul 2.JPG  Views: 33  Size: 441.3 KB  ID: 22136Click image for larger version.  Name: Paul 3.JPG  Views: 28  Size: 358.6 KB  ID: 22137Click image for larger version.  Name: Paul 4.JPG  Views: 30  Size: 127.6 KB  ID: 22138Click image for larger version.  Name: Paul 5.JPG  Views: 25  Size: 213.5 KB  ID: 22139Click image for larger version.  Name: Paul 6.JPG  Views: 26  Size: 169.9 KB  ID: 22140Click image for larger version.  Name: Paul 7.JPG  Views: 28  Size: 168.8 KB  ID: 22141