An Oslo court will announce whether mass killer Anders Breivik is sane on Friday morning.
The Norwegian right-wing extremist’s guilt is not in question - he admits killing 77 people during a July 2011 rampage.
According to a survey by Norwegian broadcaster NRK, the majority of people in the country think Breivik, 33, should be found sane.
He has said being found insane would be “worse than death.”
Whatever ruling the judges give regarding Breivik's mental health, the killer is expected to see out the rest of his days at the high security but humanitarian Ila Prison, reports the Australian, at an annual cost to the Norwegian taxpayer of up to £1.7m.
Ellen Bjercke, senior adviser at Illa Prison, said they were preparing for him to possibly spend the rest of his life in the institution either as a prisoner or patient.
"I think the loss of liberty is the major punishment regardless of what sort of conditions you have lost your liberty under," she said.
Bjercke said many think an open prison is the "hardest place to serve."
The governor of Ila prison, Knut Bjarkeid, said in a statement: "We are ready to receive Mr Behring Breivik if he is sentenced to preventive detention (prison) and also if he is sentenced to compulsory psychiatric care.
In this file image taken on July 23, 2011 and released Thursday Dec. 15, 2011 by the Norwegian police, a government building is seen a day after a car bomb went off there. (AP Photo / Police Handout via Scanpix)
Officials stand next to copies of the report from the independent commission into the July 22, 2011 attacks in Norway In Oslo Monday Aug.13, 2012. (AP Photo/Berit Roald / NTB scanpix)
Leader of the commission Alexandra Bech Gjoerv speaks during a press conference in Oslo, Monday Aug. 13, 2012. (AP Photo/NTB Scanpix, Stian Lysberg Solum)
Norwegian Prime Minister Jens Stoltenberg and Minister of Justice, Grete Faremo, answers questions in Oslo about of the findings of the inquiry published by the commission into the July 22, 2011 attacks on Monday Aug. 13, 2012. (AP Photo/Anette Karlsen / NTB scanpix)
Theodor Christopher Jaeger Lindhjem, 2 years-old from Oslo, lays down a flower outside the cathedral in Oslo Sunday July 22, 2012 on the first anniversary of a bombing and shooting rampage in Oslo and on Utoya Island. (AP Photo/Lise Aserud/NTB scanpix)
Members of the Labour Youth Organisation, AUF, gather with guests and relatives of those who died a year ago, at the Utoeya Island Sunday July 22, 2012, on the first anniversary of the bombing in Oslo and shooting at Utoeya Island BY Anders Behring Breivik. (AP Photo / Heiko Junge, NTB scanpix)
People lay down flowers outside the cathedral in Oslo, Norway Sunday July 22, 2012, on the first anniversary of a bombing and shooting rampage in Oslo and on Utoya Island. (AP Photo/Berit Roald/NTB scanpix)
Terror charged Anders Behring Breivik seen in court in Oslo, Friday, June 22, 2012. (AP Photo/Heiko Junge/pool)