No systematic research exists as to how and to what extent the German military administration during the Second World War integrated Belgian prisons in its security policy. Focusing on the Antwerp prison, this article presents an exploration of the field with a view to inciting further, in-depth and comparative analyses. How did the Kriegswehrmachtgefängnis Antwerpen function in the occupier’s law enforcement policy? How did (alleged) political opponents and offenders of German regulations end up in the Begijnenstraat and how did the population of the prison’s German section evolve? Research into prisons during the occupation provides insights into German criminal justice and persecution in Belgium.