Princess Catharina-Amalia of the Netherlands was a picture-perfect future queen in a mermaid gown and her mother Queen Maxima’s heels at a gala for the Council of State at Palace Noordeinde in The Hague. Princess Catharina-Amalia of the Netherlands was a picture-perfect future queen in a mermaid gown and her mother Queen Maxima’s heels at a gala for the Council of State at Palace Noordeinde in The Hague.