Nazi occupants established 2 sub-camps of Auschwitz in Sosnowiec, a town in south Poland. The first one, simply called Sosnowitz I, was located in the town centre, in the former Jewish community's building, turned into SS administration office.
The building still exists on Targowa Street. Back in the day, around 100 prisoners were sent there from Auschwitz to renovate the building where the SS offices would be open. Half of the prisoners were Polish, and the other half were Jewish. The Poles had more qualifications to work as carpenters, bricklayers, electricians and potters.
The prisoners lived and worked in the budilding on 12 Targowa Street and never had a reason or opportunity to leave the site. They were guarded all time and counted several times a day, and with no resistence in the camp or contact with the outside world, escape was impossible.
After the works were completed, the prisoners were moved to another sub-camp located in Łagisza by Będzin, a town nearby Sosnowiec.