After closing this inner city concentration camp, the Nazis used the Brandenburg-Görden Prison, located in Görden, a suburb of Brandenburg.
Later the old gaol became the Brandenburg Euthanasia Centre where the Nazis killed people with mental problems, including children.
They called this operation "Action T4" because of the Berlin address, Tiergartenstraße 4, the headquarters of this planned and well-organized killing "euthanasia" organisation.
Brandenburg an der Havel was one of the first locations in the Third Reich where the Nazis experimented with killing their victims by gas.
At the Centre Christian Wirth experimented in developing gas chambers for gassing the physically and mentally disabled.