Norway held a memorial on Sunday to commemorate the 77 victims of a bomb and gun massacre that shocked the peaceful nation a year ago.

In a solemn wreath-laying ceremony at the bomb site, Prime Minister Jens Stoltenberg said Anders Behring Breivik had not succeeded in his declared goal of destroying Norway's commitment to being an inclusive, multicultural society.

Later, Stoltenberg was joined by King Harald V and other members of the royal family for a remembrance service in Olso.

On July 22nd of last year, Breivik, a 33 year old far right fanatic, set explosives to the government headquarters in Oslo, killing eight then went on a shooting rampage at the left-wing Labour Party's youth camp on Utoya island, leaving 69 dead.

Breivik admitted to the attacks, but declined criminal guilt out of principle, saying the victims were traitors for embracing immigration and making Norway a multicultural society.

The Oslo district court is set to deliver its ruling on August 24.