The stone isolation cell was built in 1969. Before that, the cell was made of wood. The building has two sections: the isolation cell itself and a ward-type room. Prisoners guilty of violating the disciplinary rules in some way were put in the isolation cell for up to 15 days. Repeat offenders could be detained in a ward-type room for up to six months. The isolation cell is also known as the internal camp prison. There was a much stricter security regimen here. Prisoners’ rations were smaller than in the rest of the camp: they were only given hot food once every two days, for example. Prisoners detained in the ward-type room had to work in a special ‘workroom’ which was also located in the isolation cell building.