The King and Queen Consort will take a carriage procession through the streets of London - but on a much shorter route than Queen Elizabeth II when she was crowned.
The group, Republiek, has identified 18 different issues which they believe allow the Netherlands monarch to affect the country s democratic processes.
Principalities, kingdoms, duchies the 12 European monarchies are as diverse as the continent. There are queens and kings, of course, but also a bishop and a president. Let's not forget the Vatican!