Based on three decades of research, this is a full-scale reconstruction of three key components of the gas chambers at Auschwitz: a gas column, both sides of a gas-tight door, and a gas-tight hatch, with ladder.

These are augmented by more than 60 plaster casts of architectural evidence, including blueprints, architects’ correspondence, contractors’ bills, photographs, survivors’ testimony, drawings, and scale models of the camp and crematoria.

As the museum asserts, this represents the greatest crime committed by architects. After all, someone had to design the crematoria; architects toiled alongside other professionals during the Third Reich – doctors, engineers, lawyers, professors. They all greased the wheels of death.

The whiteness of it all works. It jars and chills. ... The three key elements – the door, the hatch and the gas column, through which the Zyklon B pellets were lowered into the chamber – were all contested in the Irving-Lipstadt case.