J.A. Topf and Sons (J.A. Topf und Söhne) was a former German engineering company, notorious for designing and manufacturing the crematoria used by the Nazis at concentration camps such as Auschwitz and Buchenwald.
Topf and Sons was asked by the SS to design special crematoria furnaces capable of cremating very large numbers of bodies. The company and its chief engineer Kurt Prüfer obliged.