Auschwitz I was the original concentration and extermination camp, located in Oświęcim, Poland. Auschwitz II-Birkenau was an expansion of the original camp built to accommodate more prisoners and act as a killing center for those deemed unfit for work or unwilling to cooperate with Nazi Germany. Auschwitz I consisted of administrative offices, barracks, warehouses, workshops and a crematorium while Auschwitz II-Birkenau had additional gas chambers and crematoria. Auschwitz II-Birkenau had a larger selection of living quarters including wooden huts that housed up to 700 people each compared to the 250 capacity at Auschwitz I. Moreover, much of the labor at Auschwitz II-Birkenau revolved around sorting through confiscated belongings rather than industrial production like at Auschwitz I. As such, most inmates were transported directly from their arrival trains straight into gas chambers instead of being held in the camp itself like they would have been at Auschwitz I.