Mauthausen–Gusen concentration camp was the hub of a large group of German concentration camps that was built around the villages of Mauthausen and Sankt Georgen an der Gusen in Upper Austria, roughly 20 kilometres (12 mi) east of the city of Linz. The camp operated from the time of the Anschluss , when Austria was annexed into the German Third Reich in early 1938, to the beginning of May 1945, at the end of the World War II. Starting with a single camp at Mauthausen, the complex expanded over time and by the summer of 1940 Mauthausen had become one of the largest labour camp complexes in the German-controlled part of Europe, with four main subcamps at Mauthausen and nearby Gusen, and nearly 100 other subcamps located throughout Austria and southern Germany, directed from a central office at Mauthausen.
As at other Nazi concentration camps, the inmates at Mauthausen–Gusen were forced to work as slave labour, under conditions that caused many deaths. The subcamps of the Mauthausen complex included quarries, munitions factories, mines , arms factories and plants assembling Me 262 fighter aircraft. The Messerschmitt Me 262, nicknamed Schwalbe, “Swallow” in fighter versions, or Sturmvogel, “Storm Bird” in fighter-bomber versions, was the world’s first operational jet powered fighter aircraft. In January 1945, the camps contained roughly 85,000 inmates The death toll remains unknown, although most sources place it between 122,766 and 320,000 for the entire complex.
The Mauthausen–Gusen camp was one of the first massive concentration camp complexes in Nazi Germany, and the last to be liberated by the Allies. The two main camps, Mauthausen and Gusen I, were labelled as “Grade III” (Stufe III) camps, which meant that they were intended to be the toughest camps for the “Incorrigible political enemies of the Reich” Mauthausen never lost this Stufe III classification. In the offices of the Reich Main Security (Reichssicherheitshauptamt; RSHA) it was referred to by the nickname Knochenmühle – the bone-grinder (literally bone-mill).Unlike many other concentration camps, which were intended for all categories of prisoners, Mauthausen was mostly used for extermination through labour of the intellegentsia – educated people and members of the higher social classes in countries subjugated by the Nazi regime during World War II The main camp of the complex in Mauthausen is now a museum.
The surviving camp archives include personal files of 37,411 murdered prisoners, including 22,092 Poles, 5,024 Spaniards, 2,843 Soviet prisoners of war and 7,452 inmates of 24 other nationalities. The surviving parts of the death register of KZ Gusen list an additional 30,536 names.