Police detectives on Wednesday completed a review of the some 5,000 items seized in connection with the terror charges investigation into Breivik whose July 22nd 2011 killing spree left 77 people dead.
"There are very few things that he wants to retain. That which he most wants to keep is a uniform and others with a symbolic connection to the Order of the Knights Templar," said John Roger Lund at Oslo police to broadcaster TV2, referring to an order of Crusaders during the Middle Ages from which Breivik has claimed inspiration.
The review of the items has been conducted together with Breivik at Skien prison where he is currently serving his 21-year sentence, while the high-security cells at Ila prison near Oslo are rebuilt.
Lund told TV2 that the mass killer is unlikely to have the uniform returned.
"The police will take a decision on that - I don't think he will be able to keep his uniform," he said.
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The items collected since the attacks are currently housed in a garage in eastern Oslo and are reported to extend to some 60 square metres.
Aside from the uniform, Breivik has requested the return of some private photographs and some certificates and diplomas. Some of the items are furthermore due to be returned to Brevik's mother.