On December 10, 2015, Their Majesties King Harald V and Queen Sonja of Norway accompanied by Their Royal Highnesses Crown Prince Haakon and Crown Princess Mette-Marit of Norway attended the 2015 Nobel Peace Prize ceremony held at the Oslo City Town Hall in Oslo, Norway.

The Nobel Peace Prize  was awarded to the National Dialogue Quartet for its “…decisive contribution to the building of a pluralistic democracy in Tunisia in the wake of the Jasmine Revolution of 2011.”