The gassing of Jews began at the latest in the spring of 1942. The report was compiled after Speer, who as the head of armaments for the Third Reich was responsible for overseeing the distribution of building materials, dispatched two of his advisers, Desch and Sander, to investigate a number of concentration camps around Germany and Poland, including Auschwitz.
They reported being shown "everything" at the camp by its leader, Rudölf Hoss, who gave them a "short report on the erection and purpose of the whole concentration camp site".
Further research by Miss Willems has shown that on the day of Desch and Sander's visit, 900 Polish Jews were murdered in the gas chambers.
Following the visit and resulting report, Speer approved the shipment of a thousand tons of steel to the camp to enable its expansion.
The head of the SS, Heinrich Himmler, wrote to Speer to thank him "very much".
Breloer argues that Speer was more than just a "cog in the works". He said: "He was not only entangled in the works, he was the terror itself.''
Wartime reports debunk Speer as the Good Nazi - Telegraph