During the Nazi occupation, several thousand Jews were transported from the forced labour camps in Plaszow and Mielec to the Wieliczka mine to work in the underground armament factory set up by the Germans in March and April 1944. The forced labour camp of the mine was established in St. Kinga Park and had about 1,700 prisoners. However, manufacturing never began as the Soviet offensive was nearing. Some of the machines and equipment were disassembled, including an electrical hoisting machine from the Regis Shaft, and transported to Liebenau in the Sudetes mountains. Part of the equipment was returned after the war, in autumn 1945. The Jews were transported to factories in Litomierzyce (Czech Republic) and Linz (Austria).,