July 22, 2021 is the 10th anniversary of the terrorist attacks on the Government Office Complex in Oslo and on Utøya island. 77 people were killed and many others were severely injured. Members of the Norwegian Royal Family attended various commemorative events during the day. Crown Prince Haakon and Crown Princess Mette-Marit attended the commemorative event in the Government Office Complex. King Harald and Queen Sonja attended the memorial service at Oslo Cathedral.