princess catharina-amalia was enrolled in bloemcamp school in wassenaar on 10 december 2007. her birthdays are usually celebrated with a concert at kloosterkerk, the hague. the concerts are attended by ambassadors and members of the royal household and the council of state of the netherlands. on her seventh birthday, a douglas c-47 skytrain once owned by her great-grandfather, prince bernhard of lippe-biesterfeld, was named after catharina-amalia by peter hartman. the princess herself did not go to the naming ceremony because of school obligations.