First of all, I didn’t make these shots, I borrowed them from the Parool newspaper site.
That’s HRH Princess Màxima, wife of the Crown Prince. Each year the café has a new sign with a royal or several royals on it, each year it’s a surprise what it will look like and it’s just for one day. More pictures of Koninginnedag you can find on the site of Het Parool
To stay in style “sliced Appeltjes van Oranje” Clean up after Queen’s Day in Het Parool