King Willem - Alexander and Queen Maxima, Princess Laurentien and Prince Constantijn of The Netherlands attend the opening of the Prince's Day 2016 (Prinsjesdag) at the Binnenhof in The Hague on September 20, 2016. Prince's Day (Prinsjesdag ) is the day on which the reigning monarch of the Netherlands addresses a joint session of the Dutch Senate and House of Representatives in the Ridderzaal or Hall of Knights in The Hague. |