Included in the building works was material to build gas chambers, crematoria and morgues. Later, the company diversified into silos, chimneys, incinerators for burning municipal waste, and crematoria. This includes for example funeral homes, coffins, crematoria, cemeteries, and headstones. Martin visited Auschwitz and witnessed the crematoria. At Buchenwald, liberated on 11 April, the crematoria ovens remained intact. It is where four gas chambers and four crematoria annihilated more than a million Jews. He served in this capacity at the gas chambers located in crematoria IV and V. The plan was to destroy the gas chambers and crematoria before launching an uprising. Anyone may arrange for a cremation to take place in any of these crematoria. The firm made crematoria for Nazi concentration camps. The book contains photographs of piles of bodies and crematoria at various concentration camps. At Auschwitz-Birkenau, the insurgents blew up one of Birkenau's crematoria on October 7, 1944. The remains of Roman kilns, crematoria and coins have been found in Wollaton. Crematoria were constructed to dispose of the deceased. The capacity of the crematoria at Birkenau was 20,000 bodies per day.